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GalinKa [24]
4 years ago
10

Closure of the atriventricular valve occurs when:

Biology
1 answer:
elena55 [62]4 years ago
4 0

Answer:

The correct answer will be option A.

Explanation:

The atrioventricular valve is one of the four valves present in the heart the function of which is to stop the back flow of the blood from the ventricles to the atrium.  

These valve opens and closes in response to the change in the pressure of the blood in atrium and ventricles.  The valve opens when blood is pumped form the atrium to ventricles which causes the papillary muscles to relax while the valve closes when the ventricles push the blood to the arteries. This causes the papillary muscle to contract which causes the chordate tendineae to create tension ad close the valve.

Thus, option A is the correct answer.

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The main function of this macromolecule include muscle development, catalyst activity and defense against disease
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6 0
3 years ago
Los temas.<br> 1. ¿La Meiosis es la división propia de células?
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Explanation:

Al igual que la mitosis, la meiosis es una forma de división celular eucariota. Sin embargo, estos dos procesos distribuyen el material genético entre las células hijas resultantes de formas muy diferentes. La mitosis crea dos células hijas idénticas, cada una de las cuales contiene el mismo número de cromosomas que su célula madre.

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3 years ago
You find a population of strange cells in a sample of pond water. You wish to determine first whether they are eukaryotic or pro
Colt1911 [192]

Answer:

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Explanation:

A prokaryotic cell lacks a membrane defined nucleus and all the membrane-bound organelles. A eukaryotic cell has a membrane-bound nucleus and other membrane-bound organelles such as mitochondria, chloroplasts, endoplasmic reticulum, lysosomes, Golgi apparatus, etc.

To determine if a cell is a prokaryotic or eukaryotic, one can look for the nucleus and the membrane-bound organelles. If the cell has a nucleus and membrane-bound organelles, it is a eukaryotic cell. The absence of these structures makes it a prokaryotic cell.

5 0
3 years ago
Draw the structure of DNA aand write a short note about it.​
artcher [175]

Answer:

DNA is made up of molecules called nucleotides. Each nucleotide contains a phosphate group, a sugar group and a nitrogen base. The four types of nitrogen bases are adenine (A), thymine (T), guanine (G) and cytosine (C). The order of these bases is what determines DNA's instructions, or genetic code.

Explanation:

i really hope this helps

please mark me as brainliest

4 0
3 years ago
Select all answers
Vesnalui [34]
A,B,C,D I'm pretty sure, but check with others who answer the question too.
6 0
3 years ago
Read 2 more answers
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