8. a) How are the events in the menstrual cycle triggered by the body? (1 point)


Will be marking brainliest!!

Answers

Answer 1

There is a supply of undeveloped eggs in the ovaries. At the beginning of the menstrual cycle, between 6 and 12 undeveloped eggs in the ovaries start to mature. A layer of cells grows around them. At around day 5 of the menstrual cycle, the biggest follicle will continue to grow for another week. At around day 14, the follicle breaks apart, and the wall of the ovary ruptures. The egg is released from the ovary into the fallopian tube, where it can get fertilized. This process is called ovulation. The uterus also changes during the course of the menstrual cycle. It has a lining of cells on the inside, kind of like a cushion with a lot of blood vessels. Fallopian tubes connect the ovaries and the uterus. The uterine cycle begins with menstruation. This is the process through which most of the lining and blood from the last uterine cycle are cleared out of the uterus to prepare for a new attempt at pregnancy. Starting at around day 5, the lining starts to grow. It builds back up to prepare a place for the egg to grow if it gets fertilized. After ovulation, the egg reaches the oviduct. If sperm cells have entered the vagina during intercourse, fertilization may occur at any time in the next two weeks. Then the fertilized egg will move into the uterus and implant itself into the lining, where development will begin.

Please mark BRAINLIEST!

Answer 2

The events in the menstrual cycle are primarily triggered by hormonal signals from the body. The menstrual cycle is a complex process regulated by the interplay of hormones produced by the hypothalamus, pituitary gland, and ovaries.

1. Hypothalamus: The hypothalamus, a region of the brain, releases gonadotropin-releasing hormone (GnRH) in a pulsatile manner. GnRH stimulates the pituitary gland.

2. Pituitary gland: In response to GnRH, the pituitary gland secretes two important hormones: follicle-stimulating hormone (FSH) and luteinizing hormone (LH).

3. Follicular phase: At the beginning of the menstrual cycle, FSH stimulates the growth and maturation of ovarian follicles, which contain the developing eggs (oocytes).

As the follicles grow, they produce estrogen, a hormone that helps prepare the uterus for a possible pregnancy.

4. Ovulation: As the estrogen levels rise, it triggers a surge in LH production by the pituitary gland. The LH surge leads to the release of a mature egg from the ovary, a process called ovulation.

5. Luteal phase: After ovulation, the ruptured follicle in the ovary transforms into a structure called the corpus luteum. The corpus luteum produces progesterone, which prepares the uterus for potential implantation of a fertilized egg.

6. Menstruation: If pregnancy does not occur, the levels of estrogen and progesterone decline. This drop in hormone levels triggers the shedding of the uterine lining, resulting in menstrual bleeding.

Know more about the menstrual cycle:

https://brainly.com/question/32267539

#SPJ2


Related Questions

What is currently being done(regulations, laws, protest,fundraising,ets.) to protect blue whales from going extinct? I need helppppp

Answers

The International Whaling has proposed a negative kill limit for bluefin tuna as well as a countrywide ban on commercial whaling.

Why do humans value blue whales?

Although blue whales have a huge food requirement, the ocean environment benefits from them rather than is burdened by them. Their iron-rich excrement is a crucial supply of nutrients for the marine food web, boosting production in the Southern Ocean and increasing fisheries yields.

How do whales protect the environment?

The "whale pump"—the way whales graze, poop, migratory, then dive between the ocean's top and depths—moves vital nutrients around the ocean. Thus, robust water bodies and the development of cyanobacteria are supported, which in turn helps lock in a significant quantity of carbon.

To know more about protect blue whales visit:

https://brainly.com/question/30219818

#SPJ1

Due to biomagnification, which of the following will likely contain the most DDT?
(a) Secondary consumer
(b) Producer
(c) Primary consumer
(d) Tertiary consumer

Answers

Due to biomagnification Tertiary consumer will likely contain the most DDT. Correct option (d).

Biomagnification is any concentration of a toxin, such as pesticides, in the tissues of tolerant species at increasingly higher levels in a food chain.  This rise might be caused by:

Persistence - a material that cannot be broken down by natural processes.Food chain energetics is the process through which the concentration of a material grows progressively as it goes up the food chain.Low or non-existent rate of internal degradation or excretion of the drug, owing mostly to its insolubility in water.

Biological magnification refers to the process by which certain substances, such as pesticides or heavy metals, make their way into lakes, rivers, and the ocean, and then move up the food chain in progressively higher concentrations as they are incorporated into the diet of aquatic organisms such as zooplankton, which are then eaten by fish, who are then eaten by larger fish, large birds, animals, or humans.

Learn more about  biomagnification to visit this link

https://brainly.com/question/24249875

#SPJ4

Why doesn't scientific evidence lead to absolute certainty?
Please choose the correct answer from the following choices, and then select the submit answer button.

It is impossible to determine what scientist's results are to be believed.
There is no guarantee that the evidence is reliable.
Natural phenomena can never be explained by science.
There are always new questions to ask and new ways to investigate questions.

Answers

Answer:

the last option

I wish you luck in your assignments.

Which of the following would cause cells to switch from cellular respiration to fermentation?
a. The final electron acceptor in the ETC is not available.
b. The proton-motive force runs down.
c. NADH and FADH supplies are low.
d. Pyruvate is not available.

Answers

The factor for cells switching from cellular respiration to fermentation is a) the final electron receptor in the TEC is not available.

The reason certain cells switch from respiration to fermentation is due to their oxygen supply and oxygen demand. If the oxygen demand of the cells is much higher than the oxygen supply, the cells can no longer sustain aerobic respiration. In this case, the cells switch from respiration to fermentation. Like combustion, cellular respiration completely oxidizes glucose to CO2 and water. Fermentation, on the other hand, does not completely oxidize glucose. Instead, small, reduced organic molecules are produced as a waste product. As a result, cellular respiration releases more energy from glucose than from fermentation.

Learn more about fermentation in

https://brainly.com/question/13050729

#SPJ4

According to the Bohr model of the atom, describe how an electron can get to an excited state. Also, describe what happens when an electron transitions to an energy level closer to the nucleus.

Answers

Yes it is
Just need points bby

What do scanning electron microscope and transmission electron microscope have in common

Answers

Answer: What they both have in common is that they both contain an electron gun.

Explanation:

The report mentioned ways that people’s lives may change because of climate change, such as rising sea levels, reduced crop efficiency, and heat waves. This information may encourage the public to change the way they use energy, for example how they heat their homes or power their cars.

Answers

The report mentioned ways that people’s lives may change because of climate change, such as rising sea levels, reduced crop efficiency, and heat waves. This information may encourage the public to change the way they use energy, for example how they heat their homes or power their cars is a true statement.

What is Climate change?

This is referred to as the long-term shifts in temperatures and weather patterns due to different factors.

It could lead to rising sea levels, reduced crop efficiency, and heat waves and the use of energy should be adequately monitored so as to prevent it from becoming worse in today's world.

Read more about Climate change here https://brainly.com/question/24316365

#SPJ1

The full question:

The report mentioned ways that people’s lives may change because of climate change, such as rising sea levels, reduced crop efficiency, and heat waves. This information may encourage the public to change the way they use energy, for example how they heat their homes or power their cars. true/false

3.0g of clean magnesium ribbon 8.0g of clean copper metal were burnt separately in equal volume of air and both metals reacted completely with air; a) State and explain where there was greater change in volume of air Mg =24 Cu = 64 (2 marks)​

Answers

The copper metal is heated in the air. The magnesium ribbon emits a brilliant light with magnesium oxide, which is white. When oxygen gas is passed over copper in the presence of heat, an oxidation reaction occurs which results in the formation of black copper oxide. The greater change in mass observed when they start to burned.

What is copper metal ?

Copper is a mineral and also an element which is essential to our daily lives. Copper is a significant industrial metal due to its high ductility, malleability, thermal and electrical conductivity, and corrosion resistance. Copper is a necessary nutrient in our diet.

Metals are a class of materials which have high light reflection. Copper (Cu), Aluminium (Al), and other metals are the examples.

The combustion of magnesium ribbon is a combined reaction. It is due to the fact that magnesium metal reacts with the oxygen to form the single product magnesium oxide. When magnesium ribbon is burned in the air, it reacts with the oxygen present in the air to form magnesium oxide.

Thus, 3g of clean magnesium ribbon and 8g of clean copper metal were burnt separately in equal volume of air and both mass reacted completely with air and the greater change in mass observed when they start to burned.

Learn more about Combustion here:

https://brainly.com/question/15117038

#SPJ1

LIMITED TIME!!!! HELP PLEASE!!
Fossils of ancestors of the modern horses show a small, 4-toed, almost dog-like browsing animal named Eohippus. Over time, the horses got larger, lost toes, and changed to a grazing diet.

What is the best explanation for why this change occurred?

Select one:
A. The horses needed to run faster, so they ran more and their leg
and foot structure adapted.

B. The horses changed their environment to fit their needs for
survival.

C. The horses with traits most suited to the changing environment
survived.

D. The horses took the extra energy from a grazing diet and used it
to grow larger.

Answers

Answer: ITS B

Explanation:

B

I wish you luck in your assignments.

the hypothalamus receives a signal from the nervous system that a specific hormone is needed to maintain homeostasis sin the body what is the next step

Answers

Answer:

A. The hypothalamus sends the needed hormone to the body.

B. The hypothalamus sends a messenger hormone to the pituitary gland.

C. The hypothalamus determines which area of the brain it activates.

Explanation:

What is the Hypothalamus?

The hypothalamus, which is a structure deep within the brain, serves as the body's intelligent control and coordination center. Its primary duty is to maintain the body in a steady state known as homeostasis. It accomplishes this by either directly altering the autonomic nervous system or controlling hormones.

Answer BreakdownChoice A is the best answer. The hypothalamus is the gland in the body that is responsible for homeostasis. Therefore, the hypothalamus will produce the necessary hormone the body needs to retain homeostasis.Choice B is not the best answer. Depending on the body's exact response, the hypothalamus may send a messenger hormone to the pituitary gland. However, the hypothalamus is generally responsible.Choice C is incorrect. The hypothalamus can transmit hormones that may go to the brain or interact with neurotransmitters in the brain but it does not "activate a portion of the brain" to maintain homeostasis.

Darius and his family are excited about taking a cross-country trip to see his parents. They plan to bring the family dog, Barnie, who does not regularly ride in the car with them. Darius is worried that Barnie might get motion sickness on the ride and asks the vet if there is something he can give Barnie to keep the poor dog from vomiting in the car. The vet says that if he prescribes a medication, it will likely cause Barnie to sleep all the way across the country! He does suggest an herbal alternative that might do the trick and writes it down for Darius to purchase at the health food store. Which herb did the vet MOST likely recommend for Barnie’s big trip?

A.
goldenseal

B.
ginger root extract

C.
slippery elm bark

D.
echinacea

Answers

If Darius and his family are excited about taking a cross-country trip to see his parents. They plan to bring the family dog, Barnie and Darius is worried that Barnie might get motion sickness on the ride. The herb that the vet MOST likely recommend for Barnie’s big trip is: B. ginger root extract.

What is motion sickness?

Motion sickness is a type of sickness that occur when a person begins to feel dizzying, nausea when the person is in a moving car or on a ride. A person with motion sickness may begins to vomit, have headache among others.

Based on this scenario the herbs that the vet most likely recommend to Darius dog is ginger root extract. Ginger is plant and this plant is good for the body as it help to boost the immune system. Ginger root extract can be used  to treat motion sickness when a person is on ride and it is used to as well stop nausea.

Therefore we can conclude that the correct option is B.

Learn more about motion sickness here:https://brainly.com/question/92301

#SPJ1

Answer:

B. ginger root extract

Explanation:

S.K., a 51-year-old roofer, was admitted to the hospital 3 days ago after falling 15 feet from a roof. He sustained bilateral fractured wrists and an open fracture of the left tibia and fibula. He was taken to surgery for open reduction and internal fixation (ORIF) of all of his fractures. He is recovering in your orthopedic unit. You have instructions to begin getting him out of bed and into the chair today. When you enter the room to get S.K. into the chair, you notice that he is agitated and dyspneic. He says to you, "My chest hurts really badly. I can't breathe." You auscultate S.K.'s breath sounds and find they are diminished in the left lower lobe. S.K. is diaphoretic and tachypneic and has circumoral cyanosis. His apical pulse is irregular and 110 beats/min

Answers

The five possible reasons for S.K.'s symptoms are :

It might be because of the decreased temperatures. Because the patient is a roofer, he is experiencing symptoms as a result of his living situation.It might be because he was born with a congenital cardiac condition.It's possible that he doesn't have enough oxygen in his lungs.He might be getting a whole new ailment.It might be a side effect of his open reduction and internal fixation surgery.

After a protracted stay at high altitude, cardiac output during exercise is reduced. These alterations in cardiac output diminish maximum oxygen absorption at high altitude, which remains low long after arterial oxygen content normalises.

Hypoxia is defined as low oxygen levels in your bodily tissues. It produces symptoms such as disorientation, agitation, trouble breathing, a high heart rate, and blue skin.

For more information on oxygen , visit :

https://brainly.com/question/25413781

#SPJ4

Reasons for such condition can be The drop in temperature could be the cause. The patient, a roofer, has symptoms as a result of his living condition and his occupation. He might have a congenital cardiac disorder, which would explain it.

Exercise-induced reduction in cardiac output occurs after an extended stay at a high altitude. Maximum oxygen absorption at high altitude is reduced by these changes in cardiac output, and it stays low even after arterial oxygen content returns to baseline. Low oxygen levels in your body tissues are known as hypoxia. It causes symptoms like confusion, anxiety, difficulty breathing, an elevated heart rate, and bluish skin. The colder temperatures could be to blame. The patient, a roofer, has symptoms as a result of his living condition and his occupation.

He could have a congenital heart defect, which might clarify it.

He might not have enough oxygen in his lungs, in such case.

He could be developing a completely new illness.

His open reduction and internal fixation surgery could be to blame.

For more such questions on cardiac muscles, refer:

https://brainly.com/question/27081052

#SPJ4

If a plant were to be exposed to only red light, would photosynthesis be possible?
a. Photosynthesis does not take place.
b. The rate of photosynthesis increases sharply.
c. The rate of photosynthesis decreases drastically.
d. The rate of photosynthesis decreases and then increases.

Answers

The correct answer is c. The rate of photosynthesis decreases drastically.

Photosynthesis is the process by which plants, algae, and some bacteria convert light energy into chemical energy in the form of glucose or other sugars. Chlorophyll, the pigment responsible for absorbing light during photosynthesis, absorbs light most efficiently in the blue and red regions of the spectrum, with a peak absorption in the red.

While red light is absorbed by chlorophyll, it is not the most efficient wavelength for photosynthesis. Therefore, if a plant were to be exposed to only red light, the rate of photosynthesis would decrease drastically compared to if the plant were exposed to a full spectrum of light, including blue light.

To know more about  photosynthesis click below:

https://brainly.com/question/29764662#

#SPJ4

in the lac operon, the protein that binds to the operator to prevent transcription is

Answers

The protein that inhibits transcription of the lac operon is a tetramer with four identical subunits called lac repressor.

The lactose operon (lac operon) is a lactose transport and metabolism operon found in E. coli and many other intestinal bacteria. Although glucose is the preferred carbon source for most bacteria, the lac operon allows for successful lactose digestion when glucose is unavailable via beta-galactosidase activity. Because gene regulation of the lac operon was the first fully characterized genetic regulatory system, it has become a leading example of prokaryotic gene regulation.

For this reason, it is frequently covered in beginning molecular and cellular biology lectures. François Jacob and Jacques Monod used this lactose metabolism system to figure out how a biological cell knew which enzyme to manufacture. Their work on the lac operon was recognized.

Learn more about  lac operon to visit this link

https://brainly.com/question/29737281

#SPJ4

hep meeeee pls

1 Answer:
Light waves are
a. electric and soundlike
b. magnetic and soundlike
c. electric and magnetic
d. electric only
2 Answer:
Which of the following does "not" require a physical medium through
which to travel?
a. light
b. sound
c. both light and sound
d. neither light nor sound

3 Answer:
Waves with frequencies slightly lower than those of visible light
are called
a. ultraviolet rays
b. gamma rays
c. X-rays
d. infrared rays

3.Which of the following indicates that light is made up of particles
rather than waves?
a. reflection
b. refraction
c. photoelectric effect
d. bending and separation

4.An object is luminous if it can produce
a. fluorescent light
b. incandescent light
c. neon light
d. all of these

5.Light produced from heat is said to be
a. luminous
b. incandescent
c. illuminated
d. fluorescent

6.Light produced by electron bombardment of low-pressure gases is
a. luminous
b. incandescent
c. illuminated
d. fluorescent

Answers

1. Light waves are electric and magnetic. The correct option is C.

2. The option that does "not" require a physical medium through which to travel is light. The correct option is A.

3. Waves with frequencies slightly lower than those of visible light

are called infrared rays. The correct option is D.

4. The option which indicates that light is made up of particles rather than waves is photoelectric effect. The correct option is C.

5. An object is luminous if it can produce fluorescent light, incandescent light, and neon light. The correct option is D.

6. Light produced from heat is said to be incandescent. The correct option is B.

7. Light produced by electron bombardment of low-pressure gases is fluorescent. The corect optrion is D.

What are electromagnetic waves?

Waves of the electromagnetic field make up electromagnetic radiation; they travel through space while carrying momentum and radiant energy. It consists of X-rays, gamma rays, microwaves, infrared, light, and radio waves.

Learn more about electromagnetic waves at: https://brainly.com/question/13874687

#SPJ1

project planning teams use project life cycle models because various types of projects have differing demands. which of the following sequences of stages is most appropriate for a life cycle model for research and development (r

Answers

The correct option is B ; concept definition - demonstration - development - production.

Research and development is mainly concerned with the development of a new concept, incorporation into a product, and delivery of product to the market as a way to improve the bottom line of the company.

It allows companies maintain a competitive edge over others in the same industry by bring new and innovative products to the customer.

The stages of R&D include: concept definition - demonstration - development - production.

The innovative idea is first defined and feasibility is evaluated.

The concept is demonstrated to show practicability of the idea.

The concept is further developed to suit customer needs.

Finally production and marketing is done to make product available to the customer.

Learn more about to cycle model

https://brainly.com/question/29787399

#SPJ4

Full Question;

Project planning teams use project life cycle models because various types of projects have differing demands. Which of the following sequences of stages is most appropriate for a life cycle model for research and development (R & D) projects?

a. define - measure - analyze - improve - control.

b. concept definition - demonstration - development - production.

c. pre-planning - design - procurement - construction - start up.

d. concept - requirements - design - code - test - turnove.

What is the typical path that dietary cholesterol takes through the digestive system from the mouth to where it is absorbed into the bloodstream?

Answers

When food components and gastric enzymes combine in the stomach, cholesterol absorption starts. The stomach controls how much gastric acid, together with bile and pancreatic juice, is sent to the duodenum.

Where does digestional absorption take place?

The majority of the nutrients in your meal are absorbed in your small intestine before being transported by your circulatory system to other areas of your body for storage or use. A special type of cell helps nutrients pass through the gut lining and into the circulation.

How do fats or oils go from the gastrointestinal tract to the heart?

The fats are absorbed by the intestinal cells. Chylomicrons are enormous lipoprotein structures made of long-chain fatty acids that carry lipids through the lymphatic system. Intestinal cells produce chylomicrons.

To know more about cholestrol visit:

brainly.com/question/1564091

#SPJ1

dogs and wolves are more closely related to each other than either is to cats. Draw a phylogenetic tree to show these relationships.

Answers

Answer:

Wolf

Dog

|

V

Cat

Explanation:

A phylogenetic tree is a diagram that shows the evolutionary relationships between different organisms. The tree is constructed using a method called cladistics, which looks at shared characteristics among different organisms.

Based on the information you provided, the tree would show that dogs and wolves are more closely related to each other than either is to cats. This would be represented by a branching pattern, with dogs and wolves being on one branch and cats on another branch, with the branch containing dogs and wolves being closer to the trunk of the tree.

It's important to note that this is a simplification and in reality the relationships between species are more complex, with many branches and sub-branches.

help me plss on all of them

2 Answer:
Which of the following is most likely to be an insulator?
a. copper
b. plastic
c. gold
d. silver
3 Answer:
Temperature is a measure of average
a. kinetic energy.
b. amount of calories.
c. amount of work.
d. heat of fusion.
4 Answer:
How would the average body temperature of a healthy human, which is
37 degrees C, be represented in Kelvins?
a. 0°K
b. 236°K
c. 310°K
d. 37°K
5 Answer:
Which of the following would require the greatest number of calories?
a. heating 1 g of water from 10°C to 80°C
b. heating 10 g of water from 10°C to 40°C
c. heating 100 g of water from 10°C to 20°C
d. heating 1000 g of water from 10°C to 12°C
6 Answer:
If a 10.0 g piece of metal required 100 cal to raise its temperature
by 20°C, what would you report as its specific heat?
a. 10 cal/g·°C
b. 200 cal/g·°C
c. 0.5 cal/g·°C
d. 2 cal/g·°C
7 Answer:
Which of the following does not happen during the phase change from
solid to liquid?
a. Heat is absorbed.
b. The temperature rises.
c. Melting occurs.
d. Molecules move faster.
8 Answer:
How much heat is needed to vaporize 100 g of water at 100 degrees C?
a. 54,000 cal
b. 100 cal
c. 80 cal
d. 800 cal

Answers

a)  Plastic Is an insulator

b) Temperature is the Kinetic energy

c)  The temperature in kelvin is 310°K

d) The greatest heat is heating 1000 g of water from 10°C to 12°C

e)  The heat capacity is 0.5 cal/g·°C

f) The temperature rises.

g) The heat needed is  54,000 cal

What is an insulator?

We know that an insulator has to do with the kind of substance that would not allow heat or current to pass through it. We know that insulators are the opposite of the conductors .

Temperature has to do measure of the average kinetic energy of the molecules of a body. We know that as the temperature increases, the kinetic energy of the molecules increases.

We know that;

H = mcdT

m = mass of the water

c = specific heat capacity of the water

dT = temperature change

100 = 10 * c * 20

c = 100/200

c = 0.5 cal/g·°C

Learn more about temperature:https://brainly.com/question/23270157

#SPJ1

saltwater intrusion occurs when group of answer choices saltwater is added to wells. saltwater is added to lakes and ponds. saltwater is pushed upstream by encroaching storms. groundwater pumped from wells along the coastline causes saline groundwater to move inland.

Answers

saltwater intrusion occurs when in all the cases,  when saltwater is added to wells. saltwater is added to lakes and ponds. saltwater is pushed upstream by encroaching storms. groundwater pumped from wells along the coastline causes saline groundwater to move inland.

The migration of saltwater into freshwater aquifers is known as saltwater intrusion, and it can have negative effects on groundwater quality, especially drinking water supplies. Aquifers at coastlines may naturally experience saltwater intrusion due to the hydraulic connection between groundwater and seawater. Saline water is denser and has a higher water pressure than freshwater because it contains more minerals. Because of this, freshwater can push saltwater inland.

Fresh water is less readily available when saltwater intrusion occurs. Two scenarios can result in saltwater intrusion: due to overpumping from the wells, there is a lateral intrusion of sea water. Greater salinity migration as a result of upconing close to coastal wells.

Many coastal locations have experienced an increase in saltwater intrusion as a result of certain human activities, particularly groundwater pumping from coastal freshwater wells. Water extraction causes fresh groundwater to sink, which lowers its water pressure and permits saltwater to move farther inland. Navigation canals, agricultural drainage systems, and other channels that allow seawater to travel inland are other causes of saltwater intrusion. Climate change-related sea level rise also adds to saltwater intrusion.

For more such questions on saltwater intrusion, Refer:

https://brainly.com/question/594912

#SPJ4

Filling a well with salt water will cause saltwater intrusion in all cases. Salt water is added to lakes and ponds. An approaching storm pushes salt water upstream. Groundwater pumped from coastal wells causes saline groundwater to flow inland.

The migration of saltwater into freshwater aquifers, known as saltwater intrusion, can adversely affect groundwater quality, especially drinking water supply. Coastal aquifers can naturally intrude into saltwater due to the hydraulic relationship between groundwater and seawater. Salt water contains more minerals, which makes it denser and more pressurized than fresh water. This allows fresh water to push salt water inland.

When saltwater intrudes, freshwater is quickly unavailable. There are two scenarios that lead to saltwater intrusion.

Seawater intrudes from the sides due to overpumping from the well. Increased salinity transfer as a result of upconing near coastal wells.

In many coastal areas, saltwater intrusion is increasing as a result of certain human activities, particularly groundwater pumping from coastal freshwater wells. Fresh groundwater subsides as a result of water extraction, reducing water pressure and allowing saltwater to seep further inland. Another source of intrusion. Sea level rise due to climate change also contributes to salt water intrusion.

For more information on saltwater intrusion, visit :

brainly.com/question/594912

#SPJ4

Which of the following statements about the classical pathway of complement activation is FALSE?
A) C1 is the first protein activated in the classical pathway.
B) The C1 protein complex is initiated by antigen-antibody complexes.
C) C3 is not involved in the classical pathway.
D) Cleaved fragments of some of the proteins act to increase inflammation.
E) C3b causes opsonization.

Answers

The answer is c)……..:………

Please help! What are all of the structures called? Anything helps!

Answers

Answer:

see below

Explanation:

A-Chonaocytes- These are found in the inner side of sponges , they have a flagellum they help in creating water current which helps the food to come inside along with water.

H-Archaeocytes:- They help in reproduction.

J- Osculum - Helps in excretion or expelling water out of sponge,

G-Ostia:- These are the openings through which water enters into the body of sponge.

The D-Osculum aids in excretion by being the orifice via which water exits the sponge after passing through the spongocoels.

B-Pinacocyte: These cells are flattened and present in a single layer on the surface of the body. They also line the canals. aid in the contraction of the sponge as well as the attachment of the sponge to the substrate.

Flattened cells called C-Porocytes are present on the sponge's outer surface, and they allow water to enter the sponge's body.

E-Amoebocyte: These amoeboid cells may carry out a variety of tasks, including digestion, reproduction, and regeneration.

F-Spices: These are structural components that support the structure of sponges.

What is the basic scientific unit for the volume of an irregular shaped item?
a. seconds
b. celsius
c. milliliters
d. centimeters cubed
e. grams
f. meter

What is the basic scientific unit for the volume of regular shaped item?
a. seconds
b. centimeters cubed
c. celsius
d. milliliters
e. grams
f. meter

Answers

Answer:

1.) its D ..

2.) its Meter.

"1) An organism with IsCAP+P+O+Z+Y+A+/F’I+ will have a normal functioning Lac operon.
a) True
b) False"

Answers

Option b is Correct. Contrary to popular belief, an organism with IsCAP+P+O+Z+Y+A+/F'I+ will not have a healthy Lac operon.

The lac operon exhibits leaky expression, which ensures that even after the removal of lactose, a little amount of eiwit is still produced. When the requirements are violated, it is crucial to get the lactose metabolism going so that lactose cannot be broken down in the cel without permease.

When lactose is present, it binds to the repressor. Thus, the DNA is released by the repressor, allowing the operator to enter freely. RNA polymerase can now be sent via the operator to view the structural elements. Ribosomes are able to synthesize the essential enzymes in this place.

Learn more about organism Visit : brainly.com/question/17259533

#SPJ4

If you are fighting an infection, your
a. lymphocytes
b. lymph
might become enlarged and painful.
c. lymph nodes
d.
capillaries

Answers

Answer:

The answer is C. lymph nodes

Explanation:

Answer the following questions in complete sentences.

1. How does freeze-thaw weathering occur in a glacier? What is the direct effect of this type of weathering?
2. What can be the results from abrasion?
3. How does deposition form from a glacier? What are two landforms that can be formed from glacial deposits?

(giving 50 points)

Answers

Freeze-thaw occurs when water continually seeps, freezes and expands, it eventually breaks the rock particles apart. Exfoliation is the process which occurs as this  develop parallel to the land surface as a consequence of the reduction in the pressure during uplift and erosion.

What is Freeze-thaw weathering?

Freeze thaw weathering occurs when the water seeps which are present in the rocks or the pores between soil particles and freezes. The expansion of the water molecule creates high pressures, which can widen the force which is present apart the soil particles.

Abrasions generally heals on their own. However, the abrasions which extend into the dermis layer may result into scarring of the tissues upon healing. The most common mechanism of formation of abrasion is due to the friction which is against the epidermis.

Depositional landforms include the glacial eskers, and kames. Drumlins  are also the landforms which are left behind by retreating glaciers. Many of the depositional landforms result from sediment deposited or reshaped by the melting water and are referred to as glacial landforms.

Learn more about Weathering here:

https://brainly.com/question/14426457

#SPJ1

Although there is no denying that something killed a third of the population of Ancient Athens, there has been debate as to cause for many years. A historian who lived through it called it The Plague and so for many years, it was accepted to be Yersinia pestis, the same as the bacteria responsible for the Black Death. Recently, though, scientists have become convinced that the outbreak was actually due to typhoid. Given that this opinion of an event that occurred hundreds of years ago has only recently changed, what conclusion can be reached?

A.
Historians understand the language of written records more clearly and have discovered that the symptoms match typhoid.

B.
Scientists have been able to examine samples of human teeth found in the Athens area and isolated typhoid in the pulp.

C.
A recent resurgence of typhoid in the Athens area leads scientists to believe that the climate is perfect for typhoid but not for Yersinia pestis.

D.
There is no real reason for the change except that some scientists believe the plague is just a catch all.

Answers

The conclusion that can be reached is that Historians understand the language of written records more clearly and have discovered that the symptoms match typhoid.

So, option A is correct.

What is typhoid?

Typhoid fever is described as a life-threatening infection caused by the bacterium Salmonella Typhi and is usually spread through contaminated food or water.

The Black Death also known as the Pestilence the Great Mortality that happened from 1346 to 1353. The plague is an infectious disease caused by a bacillus bacteria which is carried and spread by parasitic fleas on rodents, notably the brown rat.

There are three types of plague, and all three were likely present in the Black Death pandemic Bubonic plague Pneumonic plague and Septicemic plague.

Symptoms for typhoid fever include high fever, headache, stomach pain and either constipation or diarrhea.

Learn more about the black death at: https://brainly.com/question/28919701

#SPJ1

1 Structure of the Nervous System (continued)
Sequence the steps in how a nerve impulse moves from one neuron to another neuron by writing the numbers 1 to 5 in the squares to the left of the steps.

Answers

The steps in how a nerve impulse moves from one neuron to another will be:

An electrical impulse is sent along an axon, jumping from node to node in axons covered with myelin.The impulse reaches the synapse, where channels in the plasma membrane open.Vesicles containing neurotransmitters fuse with the plasma membrane and release the neurotransmitters by exocytosis.The neurotransmitter moves across the synapse and binds to receptors on the dendrite of a neighboring neuron.At the dendrite, the threshold for an action potential is reached, opening channels in the plasma membrane and causing a reversal in electrical charge.

What is the nervous system?

The brain and spinal cord make up the central nervous system, one of the two major components of the nervous system. All of the body's parts are connected by nerves that emerge from the spinal cord and make up the peripheral nervous system.

Electrical changes across the neuron membrane result in the transmission of a nerve impulse along a neuron from one end to the other.

Learn more about nervous system on:

https://brainly.com/question/26348097

#SPJ1

he primate emphasis on the visual sense is reflected in all of the following except: Group of answer choices the presence of color vision in most species. the reduction in the size of structures related to the sense of smell. visual information from each eye transmitted to visual centers in both hemispheres. enlarged rhinarium. a more forward-facing position of the eyes relative to most other mammals.

Answers

All of the following—aside from most species' lack of color vision—reflect the primate emphasis on the visual sense.

What makes the eyes of primates unique?

Their frontal face has eyes that are shielded by bony eye sockets. "Binocular vision" is the term for the resulting overlapping visual fields. Primates can estimate relative distance and motion of an item using this sort of vision, which gives them a wider range of depth perception.

Which of the following traits best describes the order of primates?

One or more of the following characteristics set primates apart from other mammals: Short nose, poor sense of smell, prehensile five-digit hands and feet with flat nails instead of claws, unspecialized structure, unspecialized behavior, prehensile five-digit hands and feet,

To know more about visual sense  visit:-

https://brainly.com/question/28013973

#SPJ4

How did the comb jelly become invasive?

Answers

Answer:

The comb jelly (Mnemiopsis leidyi) became invasive in the Black Sea in the early 1980s, likely due to its introduction via ballast water from ships from the east coast of the United States. Its rapid spread and high reproductive rate allowed it to become the dominant species in the Black Sea, out-competing native species for food and resources. It has since spread to other parts of the world, including the Mediterranean Sea and the Caspian Sea.

Explanation:

Other Questions
Mr. Davidson owns a development company that has built waterparks in several dozen cities. He took out a loan for $500,000 to develop a waterpark in his hometown in florida. He made this decision based on reports that several new businesses were going to open there, including a new automobile manufacturing facility. Halfway through the construction of the waterpark, the automobile manufacturer decided to location elsewhere causing a severe economic downturn in his community. How will this economic problem affect mr. Davidson's requirement to repay the loan? AWS' S3 beats its competitors in most storage aspects, including for frequently accessed data. (true or false) PLEASE ANSWER QUICK ITS 100 POINTS AND BE RIGHTDETERMINE THIS PERIOD A solenoid of radius 4mm and length of 3cm carries a current of 100 mA. How many turns of wire are required to produce a magnetic flux density B of 20 mWb/m2 at the center of this solenoid? Assume, solenoid length is much longer than the radius. Sonali purchased some pants and skirts the numbers of skirts is 7 less than eight times the number of pants purchase also number of skirt is four less than five times the number of pants purchased purchased Which of the following can you infer from studying the map?North Korea signed the Nuclear Nonproliferation Treaty and forfeited its nuclear weapons.Though Russia signed the Nuclear Nonproliferation Treaty, it possesses nuclear weapons.Pakistan broke the agreement it made by signing the Nuclear Nonproliferation Treaty.Countries that signed the Nuclear Nonproliferation Treaty do not possess nuclear weapons. any finite set is countable (a) true (b) false Complete parts a) and b). Let y=[4 5 1], u1=[2/3 2/3 1/3], u2=[-2/3 1/3 2/3] and W=Span{u1,u2}.Let y =| 5|, u1= , u2 =| 1, and w-span (u1,u2). Complete parts(a)and(b). a. Let U = | u 1 u2 Compute U' U and UU' | uus[] and UUT =[] (Simplify your answers.) b. Compute projwy and (uuT)y nd (UU)y (Simplify your answers.) The wavelength of a particular color of orange light is 650 nm. The frequency of this color is ____ sec-1 (1 nm = 10-9 m) How do residential buildings and patterns of land use reflect and shape the city's culture, technological capabilities, cycles of development, and infilling? vector a has components =4.43 and =16.5 . what is the magnitude of this vector? 2. L Why do you think Shakespeare wants to present their relationship in this way? What is he saying about these characters? There has been an explosion at a local chemical plant. A private car arrives at the emergency department with 4 victims whose clothes are saturated with a strong-smelling liquid. The victims are wheezing. The nurse should implement which intervention first?1. Assessing the pt's respiratory systems2. Decontaminating the pts3. Donning personal protective equipment4. Providing oxygen by NC what famous economist said, there are no solutions, only trade-offs? Electrical wires are generally protected by a tube of plastic. Similar insulating function is preformed in the neevous system by the: how can dissaving in the current period be funded? (i) borrowing from friends (ii) bank loans (iii) previous savings (iv) current income earned(ii), (iii), and (iv) (i), (ii), and (iii) (ii) and (iii) (i), (ii), (iii), and (iv) Bramble Corp. purchased machinery for $920000 on January 1, 2017. Straight-line depreciation has been recorded based on a $59500 salvage value and a 5-year useful life. The machinery was sold on May 1, 2021 at a gain of $13000. How much cash did Bramble receive from the sale of the machinery?$127733$246733$161233$187233 wyhat is the function of hcl in friedel crafts acylationA. to absorb HClB. to absorb waterC. to produce nucleophileD. to produce electrophile A 3.4 ft radius solid disk has a rotational speed of 48.17 rad/sec and 2300 ft-lb of rotational kinetic energy. WHAT IS THE MASS OF THE DISK? TRUE OR FALSE mill argues that the government is almost never justified in silencing individuals expression of their opinions.