1. "For oxygen to enter the blood, how must the concentration of O2 in the alveoli compare to O2 in the blood?" 2. "For carbon dioxide to leave the blood and enter the alveoli, how must the concentration of CO2 in the blood compare to CO2 in the alveoli?" 3. "When diffusion has reached equil- ibrium, we say that the net movement of the molecules is zero. Does movement stop? Explain."
Answer:
1. Concentration of O2 in the alveoli must be more than that of the blood
2. Concentration of CO2 in the blood must be more than that of the alveoli
3. Movement does not stop (find the explanation below).
Explanation:
Gaseous exchange i.e. taking in of O2 and taking out of CO2, takes place in the alveoli/air sac of the lungs. However, the movement in and out of O2 and CO2 from the alveoli into the bloodstream and vice versa follows the principles of SIMPLE DIFFUSION. Diffusion is the process whereby substances move from a region of high concentration to a region of low concentration until they are evenly distributed. Based on this, the following will occur:
1. The concentration of O2 in the alveoli must be more than that in the blood in order for oxygen to enter the blood via diffusion.
2. The concentration of CO2 in the blood must be more than that in the alveoli in order for carbon dioxide to leave the blood and enter the alveoli via diffusion.
3. When the rate of diffusion is at equilibrium i.e. no net movement is occuring die to equal concentration of the substance on both sides, the substances begin to move in the opposite direction at an equal rate. Note that, at equilibrium, MOVEMENT DOES NOT STOP, however, there is an equal rate of movement.
PLZ HELP WILL GIVE BRAINLIE AND STARS AND I WILL BE YOUR FRIEND
passive: doesn't require energy, from high to low concentration
active:requires energy, from low to high concentration
i dont know maybe
Many plants can reproduce both sexually and asexually. For example, rose bushes reproduce asexually when cuttings planted in the ground grow roots and become a new rose bush. They can also reproduce sexually when their flowers are pollinated. What is the primary advantage of sexual reproduction in roses?
Choose the correct answer.
(1 point)
A.
Roses can produce more offspring in sexual reproduction.
B.
Roses reproduce more quickly when reproducing sexually.
C.
Roses produced through sexual reproduction have more genetic variation.
Answer:
C. or A. but I think u should try C. first sorry if I'm wrong
plants reproduction can also reproduce sexually when their flowers are pollinated. They can also reproduce sexually when their flowers are pollinated. Roses produced through sexual reproduction have more genetic variation.
what is reproduction in plants ?Reproduction in Flowering Plants occur both asexually and sexually, flowering plants or angiosperms, use the sexual mode of reproduction.
Reproduction in Flowering Plants occurs in the flower as both male and the female gametes are present in it, various parts of flower involve in the process of reproduction.
There are four important steps in the reproduction of flowering plants. such as Pollination, Gametogenesis, Fertilization
The flower is a specialized structure where reproductive part of the plant, containing the male and female reproductive organs which facilitate fertilization.
For more details regarding plant reproduction, visit
https://brainly.com/question/6750187
#SPJ6
Why does the cell complete DNA replication?
Answer:
The cell must replicated DNA because when the cell divides, the daughter cells must have identical copies of DNA. DNA replication occurs in the S phase during interphase of the cell cycle.
Normal cells become cancer cells when
1. regulation of cell growth and division is lost.
2.All of the above
3.cells do not respond normally to control mechanisms.
4.cells continue to divide without passing through G1.
Answer:
Cancer is unchecked cell growth. Mutations in genes can cause cancer by accelerating cell division rates or inhibiting normal controls on the system, such as cell cycle arrest or programmed cell death. As a mass of cancerous cells grows, it can develop into a tumor.
Explanation:
this is what i found
hope it helps
Before conducting an experiment, a scientist needs to review _____.
Answer:
post a testable question
state hypothesis
Answer:
make sure they have a testable question
Explanation:
The study of how traits are passed from parent to offspring.
A.
Inheritance
B.
Gene Expression
C.
Translation
D.
Genetics
Answer:
Genetics
Explanation:
Genetics is the study of how traits are passed down to generations, like from parent to offspring.
Gregor Mendel is known as the father of genetics and was one of the first to study how traits were passed down across generations.
So, D is the correct answer.
Describe the process of respiration which takes place in human beings when oxygen
is not available and give an effect
a _____ is an organism that cannot produce its own food, so it must obtain its energy by eating or other organisms
Answer: Heterotrophs
Explanation: Heterotrophs, also known as other-feeders, can't capture light or chemical energy to make their own food out of carbon dioxide. Humans are heterotrophs. Instead, heterotrophs get organic molecules by eating other organisms or their byproducts. Animals, fungi, and many bacteria are heterotrophs.
Answer:
Heterotrophs
Explanation:
Heterotrophs, also known as other-feeders, can't capture light or chemical energy to make their own food out of carbon dioxide. Humans are heterotrophs. Instead, heterotrophs get organic molecules by eating other organisms or their byproducts. Animals, fungi, and many bacteria are heterotrophs.
Autotrophs such as plants do that
The days are longer or shorter because the earth’s axis in blank
PLEASE HELP ME
Answer: Orbit
Explanation: The Earth’s axis being in orbit means that the Earth is in different positions around the sun at different points in time, causing day and night.
explain why people sleep under mosquito nets in some parts of the world
Answer:
A mosquito net is a type of meshed curtain that is circumferentially draped over a bed or a sleeping area, to offer the sleeper barrier protection against bites and stings from mosquitos, flies, and other pest insects, and thus against the diseases they may carry
The Villi list of adaptation
Answer:
Following are the salient adaptations of villi that make them good absorbers:
Villi are single cell thick. ...
Villi have rich network of blood capillaries . ...
Most important is: Apical membranes of Villi further form many finger-like projections called microvilli or brush borders. ...
Villi have permeable membranes .
when you combine two or more substances and something new is created that is an example of
A) MATTER
B) PHYSICAL PROPERTIES
C) CHEMICAL CHANGE
D) PHYSICAL CHANGE
This is C)chemical change
For example combustion where an organic compound is turned into CO2 and water.
A single-cell organism that reproduces asexually through mitosis contains 24 chromosomes. When the organism reproduces, how many chromosomes will there be in the resulting daughter cells?
Answer: there will be 24 daughter cells I believe.
Explanation:
i want to play a game, like guess what line from the tv show or movie it came from
(omg im so bad at explaining things so if u didn’t understand anyways)
on what tv show or movie did this come from “MOM GET OFF THE PHONE”
it’s probably easy but okay.
BESTFRIEND WHAT IS THISSSSSS????
NOBODY UNDERSTANDS WHAT YOUR TRYING TO SAYYYY
What is meant by the term Reference Front?
Explanation:
The RF value is defined as the ratio of the eistance moved by the solute(i.e the day or pigment under test)and the distance moved by the solvent (known as solvent front)along the paper,where both distance are measured from the common origin or application baseline,that is the point where the sample is
2. This body system sends out scouts to recognize pathogens such as
bacteria and viruses. Once identified, it produces antibodies to attack
and kill the pathogen. What body system is being described?
A-Immune
B-cardiovascular
C-muscular
D-digestive
which greenhouse gas is found in the highest concentration in the atomsphere
Answer:
watter vaper i beleave
Explanation:
Would a greater or less amount of exposed surface area absorb thermal energy faster? Why? Give an example.
Answer:
Explanation:
A greater amount of surface area exposed will absorb thermal energy faster compared to a surface with a lesser exposed area.
Thermal energy is a form of kinetic energy in which the molecules of a medium increases their velocity.
In a large area with high surface are exposed, the molecules are spread out openly without obstructing each other. This will enable a faster thermal conduction through a system. A small exposed surface area inhibits thermal conduction. Solar panels are designed to expose more surface area to abstract more thermal energy.How would the levels of organization in the body work to get the marching band member back to being uninjured? Does homeostasis in and between cells help to return organ systems and the organisms as a whole back to homeostasis?
Answer:
Repairing ability and homeostasis causes the injured parts to return back to uninjured.
Explanation:
Due to repairing ability of levels of organization in the body helped the injured parts to return back uninjured. Yes, homeostasis that is present in and between cells help to return organ systems back to homeostasis or equilibrium state of the body. Our body has the ability to main homeostasis whenever some disturbance occur in the body. If this homeostasis not present our body, there will be no repairing of damaged occurs.
It should be noted that the repairing ability and homeostasis are vital as they cause the injured parts to return back to being uninjured.
Homeostasis simply means the process that living things use to maintain stability while they adjust to the conditions that are best for their survival.
The homeostasis that is present in and between cells is vital for returning systems back to the equilibrium state of the body. The body of an individual has the ability to maintain homeostasis whenever there is some disturbance that occurs in the body.
Read related link on:
https://brainly.com/question/19498797
What location will enter darkness next as Earth's rotation continues ?
Answer:
well for me I think it's
Explanation:
the B
Answer:
I believe it is C
Explanation:
Explain what are ethics.
What are your feelings toward HeLa cells? (in at least 4 sentences)
Ethics are principles that govern a person’s behavior or the conducting of an activity
Answer:
HeLa cells are a great find in the science community and Henrietta Lacks' unique cells are still helping us today. They are perfect for important studies such as cancer, cell biology, genetics, and infectious diseases. Since now we have these unique immortal cells it is quite easy to start any scientific testing on human cells since their is an endless supply. Personally, I believe Henrietta Lacks will live on forever as a hero and mother of modern scientific advancements, since she quite literally, grew all of the modern cell research we have today.
Explanation:
From one trophic level to the next, only_(a) % of the energy is transferred. The other
(b)___% is used by the organisms getting consumed during its life processes.
A. (a) 25, (b) 75
B. (a) 10, (b) 90
C. (a) 75, (b) 25
D. (a) 90, (b) 10
Answer:
B. (a) 10, (b) 90
Explanation:
The ecosystem consists of a flow of energy that unidirectional and there is always a decrease in the amount of energy when it's transferred from one place to another. Such as in the food chain there is a transfer of 10% amount of energy which is used by the various organisms and 90% of energy is lost between the tropic levels in form of heat and respiration.hey please help plzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzz
Answer:
true.
Explanation:
the dominant (ex. RR) crossed with recessive (ex. rr) will make for example Rr, Rr, Rr, and Rr, which are all heterozygous.
Which genre uses narrative techniques to recount personal experience and development?
Answer:
A memoir.
Explanation:
A memoir is a biography written by someone that includes their personal experiences and knowledge. It's also kind of like a narrative.
Hope this helps! Have a nice day!
Jimmy is planning on making a new deck in his backyard this spring. 1. He must wait until the ground reaches a temperature of 6 degrees Celsius before he can begin building. Jimmy knows that, on average, the temperature increases 2 degrees Celsius per week in the spring. If the temperature is -12 now, how long must Jimmy wait before he can begin work?
Answer:
9 days
Explanation:
What makes sperm and testosterone
Answer:
your brain makes special hormones called GnRH, and these hormones signals the testes to make more testosterone.
Explanation:
i hoped this helped:)
Which part of plant cell helps the cell during cell division of plant cell ?
Answer:
nucleus
Explanation:
Nucleus helps in cell division.
what makes the two kinds of maritime air masses similar?
air masses uniform temperature and moisture content in horizontal direction. the properties of air masses are determined by the underlying surface properties where they originate
Which substance increases its volume when it becomes a solid?
A. Mercury
B. Water
C. Salt
Answer:
B
Explanation:
when water is frozen, it expands, something to do with anomolous expansion of water.
Water increases its volume when it becomes a solid.
Define volume and its units?Volume is a measure of occupied three-dimensional space. It is often quantified numerically using SI derived units or by various imperial or US customary units. The definition of length is interrelated with volume.
The surface-area-to-volume ratio, also called the surface-to-volume ratio and variously denoted sa/vol or SA:V, is the amount of surface area per unit volume of an object or collection of objects.
If volume is the amount of 3-D space contained by a closed surface (e.g. the amount of space within a given cube, or cylinder, or any other 3-D shape), liquid volume is a way to measure an amount of liquid by describing it how much 3-D space it occupies.
Learn more about volume:
https://brainly.com/question/1578538
#SPJ2