If u looked at a SA cells and cardiac muscle cells under a microscope, do u think they would look the same or different from each other? Explain ur reasoning HELP MEE PLSSSSS

Answers

Answer 1

Answer:

They look a little bit different. SA cells contain fewer mitochondria, fewer myofibers, and a smaller sarcoplasmic reticulum. This means that the SA node cells are less equipped to contract compared to the atrial and ventricular cells.


Related Questions

What practice helps scientists avoid bias in their findings

Answers

To conduct a scientific investigation without bias, you would need to select a random sampling of people and set up preliminary guidelines.


The diagram below represents a sample of a sedimentary rock viewed under a
microscope. Which part was formed first?

Answers

What diagram?????????

Which of these is an impact of burning coal for energy?
A. acid rain
B. mercury released into the waterways
C. Increased carbon dioxide in the environment
D. all of the above

Answers

The answer is D. All of the above
The answer is D all of the above

Based on scale of 100 and represents average performance

Answers

Answer:

Ok what is the question good sir/madam?

Answer:

Explanation:

Yes i agree with the other answer SIr or Ma'am but i don't know if this question!

pls help will give brainliest

Answers

From left to right: Photosynthesis , Respiration

Answer:

The first one is Photosythesis and the second one is Respiration

Explanation:

Where do nutrients enter the body?

Answers

Answer:

thru the nucleus or cell wall i think

Explanation:

Answer: The small intestine absorbs most of the nutrients in your food.

Explanation: The small intestine is good for absorption due to it having a large inner surface area.

describe how you would test a sample of powdered milk to see if it contained protein ​

Answers

Answer:

How would you  contained protein ​

Explanation:

One would test a sample of powdered milk to see if it contained protein ​by using copper sulfate solution and  sodium hydroxide solution.

What is protein?

A structure composed of amino acids. The body need proteins to function properly. They serve as the building blocks for several bodily components, including the skin, hair, and enzymes, cytokines, and antibodies.

An essential component of a balanced diet is protein. Amino acids are the chemical "building blocks" that make up proteins.

Amino acids are used by your body to create hormones, enzymes, and to build and repair muscles and bones. They can be utilized as a source of energy as well.

The test can be done as:

To your meal solution, add a few drops of copper sulfate solution. A few drops of sodium hydroxide solution should be added. Protein is present in the food if the solution becomes purple.

Thus, using copper sulfate solution and sodium hydroxide test, one can determine the protein content in the sample.

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in what parts of the cycle do you think phosphorus spends the most time​

Answers

Answer:

what is a phosphorus

Explanation:

These are carbohydrates -rich vegetables EXCEPT
a. Tubers
b. nuts
c. seeds
d.roots​

Answers

The answer is a. Tubers
roots - “they are so high in carbohydrates that they are more like grains than greens” :)

Which of these genotypes represents a carrier?
Аа
aa
XXY
AA

Answers

Answer:

Aa

Explanation:

from what I can remember from 7th grade science

Assume that one backbone of a DNA molecule has the sequence given below. A-T-G-G-G-G-G-C-G-A-T-A-T-T-T-T-A-T-C-C-G-A-C-G For this sequence: give the expected sequence of the other DNA backbone. T-A-C-C-C-C-C-G-C-T-A-T-A-A-A-A-T-A-G-G-C-T-G-C give the RNA sequence transcribed from the original DNA backbone. U-A-C-C-C-C-C-G-C-U-A-T-A-A-A-A-U-A-G-G-C-U-G-C give the Amino Acid sequence of the protein built from the original DNA backbone.

Answers

Answer:

DNA: ATGGGGGCGATATTTTATCCGACG

RNA: AUGGGGGCGAUAUUUUAUCCGACG

Protein: MGAIFYPT

Explanation:

Transcription is a genetic process by which the information in a strand of DNA is copied into RNA, typically a messenger RNA (mRNA) sequence which is subsequently used to create a protein by the process of translation. During translation, each triplet of nucleotides or 'codon' corresponds to a specific amino acid. For example, AUG is a codon that codes for methionine (M) and also acts as an initiation codon at the beginning of the nascent polypeptide chain.

In ancient times, people believed Earth was the center of the Solar System. Which of the following makes the geocentric model impossible?
O The moon revolves around Earth.
O Earth's gravitational force is much less than the Sun's.
o Orbits are elliptical, not circular
There are other planets that are closer to the Sun.

Answers

I believe that the answers is “Earth’s gravitational force is much less than the Sun’s”

I hope I was helpful! Have a nice day! ~(^v^)~

A scientist is observing a new species of organism. She observes that from generation to generation many of the organisms’ offspring have adaptations that their parents did not have. This organism is most likely reproducing through_______.

a. sexual reproduction
b. budding
c. asexual reproduction
d. binary fission

Answers

A sexual reproduction took the quiz fwm on insta chasedowndee400

Transcription is the process of making

Answers

Transcription is the process of DNA copying into messenger RNA (mRNA)

The mutations responsible for the dark fur color in the Arizona mice were absent from the three different populations of New Mexico mice. No Mc1r mutationswere associated with dark fur color in the New Mexico populations. These findings suggest that adaptive dark coloration has occurred at least twice in the rock pocket mouse and that these similar phenotypic changeshave different genetic bases. How does this study support the concept that natural selection is not random

Answers

Answer:

Following are the solution to the given question:

Explanation:

Please find the complete question in the attached file:

In the given question, the whole study reinforces the fact which natural selection also isn't transformed through producing much more confirmation which genetic polymorphisms occur because once required as well as that they can produce the very same mutation as a function of climate transformation except in specific environments.

How do bacteria multiply again? Use the key terms genetic information, DNA, split in two, and exponential growth.

Answers

Answer:

Bacteria are asexual. This means that they are not like us, as they do not need a partner to multiply. A bacterium can become two bacteria all by itself. Then those two bacteria can each multiply again on their own and so, they become four bacteria.

Explanation:

Hope this helped Mark BRAINLEST!!!

Emilia Burton is an 18-year-old high school student who began to experience weight loss despite a ravenous appetite and resulting increased dietary intake. She has to make frequent trips to the bathroom to urinate and has difficulty concentrating on her work because of fatigue. She drinks large volumes of coffee to help with a constant dry mouth and to combat her fatigue. At a clinic appointment, it was noted that her weight has dropped from 140 lb to 128 Ib.
a) What is the probable diagnosis of this patient? What information from the above scenario would support your diagnosis?
b) What laboratory test(s) should be performed? Which result(s) would support your diagnosis? What immediate and long-term therapy will Emilia need to manage her disorder?
c) Emilia should be aware of the potential acute and long- term complications of her condition. What are they?

Answers

Answer:

A) The diagnosis is Diabetes mellitus which is based on the given symptoms that are weight loss, dry skin, fatigue, profuse urination, ravenous hunger all confirm diabetes.

B) Test for confirmation of diabetes Mellitus are-

Fasting plasma glucose test

Postprandial glucose test

Random plasma glucose test.

A1C test

If the test shows higher blood glucose it confirms the diagnosis

Immediate Treatment:-

Medication

Long term treatment:

Exercise controls the blood sugar

Diet should be healthy and should avoid high glucose options.

C) Acute and long term complications:-

Diabetic retinopathy

Diabetic foot

Diabetic neuropathy

Coronary heart disease

Kidney damage

Cerebrovascular disease.

Which is an adaptation that helps birds maintain a stable body temperature?
air sacs connected to lungs
large chest muscles
down feathers
nearly hollow bones

Answers

Which is an adaptation that helps birds maintain a stable body temperature?

down feathers

Answer:

the answer is down feathers. Or C

Explanation:

I just took the unit review test

Please Help!!!!
Muscles intended for large, powerful contractions contain llx muscle fibers. true or false​

Answers

Answer:

True

Explanation:

Been learning and know

What is AB?
A
12
B.
C
35

Answers

Answer:

hah? i don't get it

Explanation:

You perform an experiment in which chromatin is isolated from sea urchin sperm cells and briefly digested with micrococcal nuclease. When the chromatin proteins are removed and the resulting purified DNA is analyzed by gel electrophoresis, you observe a series of DNA fragments that are multiples of 260 base pairs in length (that is, 260 bp, 520 bp, 780 bp, and so forth). a) Although these results differ somewhat from the typical results discussed in the chapter, explain why they still point to the likely existence of nucleosomes in this cell type. b) What can you conclude about the amount of DNA that is associated with each nucleosome

Answers

Answer:

a) DNA fragments associated with histone proteins are all multiple in length (i.e., 260 bp, 520 bp, 780 bp, etc), thereby suggesting the presence of a pattern of organization in the chromatin  

b) it suggests that each unit of organization (ie, each nucleosome) consists of 260 bp associated with chromatin proteins

Explanation:

The nucleosome is considered as the basic unit of chromatin. A nucleosome consists of approximately two turns of DNA wrapped around a core of eight histone proteins (i.e., a histone octamer). The histone octamer consists of two copies of each of the histones H2A, H2B, H3, and H4. Moreover, the nucleosomes are connected together by linker DNA sequences which vary between 10 and 100 bp in length.

PLEASE HELP!!!!
Explain what causes a muscle to go into rigor mortis. Your answer should include the circumstances which cause it, as well as why those circumstances cause the effect (what is happening in the muscle at a molecular level which causes the stiffness). ​

Answers

Explanation:

Rigor mortis develops as the body's energy source (adenosine triphosphate [ATP]) is depleted. Muscle fibers require ATP for relaxation; once depleted, actin and myosin proteins remain complexed, resulting in stiffening of the muscles..

Thanks my answer and vote it 5 star and Mark it in brainliest answers please please please please please please please please please please please please please please please please please please please please please please

Determine the rate of oxygen consumption at each temperature for comparison. Then divide the higher rate by the lower rate to obtain the difference (ratio) between the two temperatures. Round your answer to the nearest 0.1. It can be concluded that mouse respiratory rate (increases or decreases) when temperature is lowered. In this experiment there was a fold difference in respiratory rate at the two temperatures.

Answers

Answer:

In mice rate of respiration increases as the temperature drops.

Explanation:

As the temperature decreases, the respiration rate also decrease because the body needs less oxygen for the production of energy. But in the case of mice, the rate of respiration decreases and the reason is the fear. Results showed that the respiration increased in mice as the decrease in temperature occur, caused due to the fear instilled in the mice towards cold temperature so in mice rate of respiration increases as the temperature drops.

What evidence do we have that all continents were merged into one super-continent called Pangaea 250 million years ago?

Answers

Glacial deposits, specifically till, of the same age and structure are found on many separate continents that would have been together in the continent of Pangaea. Fossil evidence for Pangaea includes the presence of similar and identical species on continents that are now great distances apart.


Which feature of the Earth's surface is caused by wind?
A)
rock quarries
B)
canyons
C)
sand dunes
for
D)
mountains

Answers

Answer:

b canyons

Explanation:

Apply: Suppose a template strand of DNA had the following sequence: T A C G G A T A A C T A C C G G G T A T T C A A What would be the complementary strand of mRNA?

Answers

AUG CCU AUU GAU GGC CCA UAA GUU

The corresponding nucleotide sequence is present on the coding strand. No complementary sequence exists on the template strand.

What changes occur in complementary strand from template?

The DNA strand from which the mRNA is produced is known as the template strand. The DNA strand opposite the template strand is known as the coding, or non-template, strand, and it has the same sequence as mRNA except T to U substitutions.

The template strand, one of the two exposed DNA strands, acts as a model for transcription.

The RNA product is essentially identical to the non template (or coding) strand of DNA and is complementary to the template strand.

Therefore, AUG CCU AUU GAU GGC CCA UAA GUU is the complementary strand of mRNA.

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Which of the following is not a function of the bacterial cell wall?

A. Provide the cell with shape and rigidity
B. Prevent the cell from lysing
C. Protect the cell
D. Provide the cell with locomotion

Answers

Answer:

D

Explanation:

I believe locomotion would be the job of the flagellum

The correct option that is not a function of the bacterial cell wall is : ( D ) Provide the cell with locomotion

The Bacterial cell wall acts mainly as a protective cover to the cell of the bacterium, protecting the cell from lysing ( preventing the breakdown of the cell via osmotic pressure ). The cell wall also provides the cell with shape a and rigidity.

While The locomotion of the cell is not the responsibility of the cell wall but it is made possible by the flagellum.

Hence the non - function of a bacterial cell wall is providing the cell with locomotion.

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This equipment can be used for plowing ,planting,cultivating,mowing soil and pulling farm machinery,what is it?​

Answers

Is the moldboard plow

Ethylene, a hormone found in plants, is produced to ripen fruits. These fruits ripen and drop to the ground where they release seeds. Which two plant systems are interacting when this occurs?

Answers

Answer:

Response and reproduction system

Explanation:

Because it's most resistant to deterioration, which type of molecule is most often found in molecular fossils?

A. RNA molecules
B. Protein molecules
C. DNA molecules
D. Lipid molecules

Answers

Answer:

Of the four main groups of organic molecules, Lipids are the most resistant to decay. They are also highly insoluble in water. All cells produce this type of organic compound to be used in their membranes and in energy storage. These type of organic molecules are found in kerogens

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