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tekilochka [14]
3 years ago
6

What is the purpose of vesicles

Biology
1 answer:
rjkz [21]3 years ago
3 0
When a cell needs to move a molecule many times, it uses vesicles<span>. </span>Vesicles<span> are cellular organelles that are composed of a lipid bilayer. You can think of </span>vesicles<span> as cellular envelopes that are used to transport materials from one place to another. </span>Vesicles<span> also </span>function<span> in metabolism and enzyme storage as well.</span>
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In the heart, the valves are located between atria and ventricles and between ventricles and arteries (option D).

<h3>What are valves in the heart?</h3>

Valves are membranous partitions which permit the passage of the contents of a vessel or cavity in one direction, but stop or control the flow in the opposite direction.

Valves in the heart enforce a one-way blood flow through the heart and separate atria from ventricles, and ventricles from the large arteries that leave them.

The four valves in the heart and their location is as follows:

  1. tricuspid valve: located between the right atrium and the right ventricle
  2. pulmonary valve: located between the right ventricle and the pulmonary artery
  3. mitral valve: located between the left atrium and the left ventricle
  4. aortic valve: located between the left ventricle and the aorta.

The valves between the atria and ventricles are called atrioventricular valves or cuspid valves while those at the bases of the large vessels leaving the ventricles are called semilunar valves.

Therefore, it can be said that the valves of the heart are located between atria and ventricles and between ventricles and arteries.

Learn more about valves of the heart at: brainly.com/question/28266922

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2 years ago
Which of the following is a biologist?
Alchen [17]
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3 years ago
Similarties and differences between the three fungi divisions
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Explanation:

It's little bit short but it will help you and you can get full mark hope it will help you! Have a nice day. ^_^

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Which of these does not occur in the Krebs cycle?
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the answer you are looking for is B. Glucose is broken down into two pyruvate molecules.

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it causes the depolarization of the target cell

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Glutamate is an excitatory amino acid neurotransmitter that binds to specific receptors on the surface of target cells and thus causes its depolarization. During glutamate-mediated depolarization, the difference in charge inside and outside the cell is lost due to the entry of sodium and calcium positive ions into the postsynaptic cell (neuron) through specific ion channels. Moreover, glutamate binding also leads to the exit of potassium ions from the cell, thereby resulting in excitation. Through this mechanism, glutamate regulates many signaling pathways, such as those involved in memory, learning, emotions, cognition, motor control, etc.

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