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Karo-lina-s [1.5K]
3 years ago
7

The cessation of stimulation at the NMJ following release of the neurotransmitter, Acetylcholine (ACh) occurs by which of the fo

llowing?
A) re-uptake at the synaptic knobs
B) enzymatic action of Acetylcholinesterase
C) diffusion from the synaptic cleft
D) none of the above
E) A, B and C are correct
Medicine
1 answer:
Zanzabum3 years ago
8 0

Answer:

The correct answer will be option B- enzymatic action of Acetylcholinesterase.

Explanation:

At the neuromuscular junction, the neurotransmitter acetylcholine is released which then binds to the receptor in motor-end plate causes depolarization of the membrane responsible for the release of Ca⁺² ions. These Ca⁺² ions control the contraction of the muscle by binding to troponin.

This mechanism of muscle contraction is blocked after the breakdown of the acetylcholine by the "enzyme acetylcholinesterase" which leads to the closure of the Na⁺ ion-channels. The closure of these channels slows down the depolarization in muscle fiber and thus blocks the pathway which leads to muscle relaxation.

Thus, Option-B is the correct option.

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I agree

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A mother brought her four-year-old daughter to the doctor, complaining that her daughter didn't "look right." The child's forehe
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Rickets disease.

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A home health nurse is instructing an older adult patient regarding dietary changes to help prevent constipation. what changes s
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To know more about constipation, here

brainly.com/question/4648095

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Describe diffusion and osmosis, as well as comparing hypotonic, hypertonic and isotonic solutions.
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Answer:

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Osmosis is a process in which solvent (molecules) pass through a semipermeable membrane (SPM) from a lower concentration solution region to a higher concentration region so it equalizes the concentrations on each side of the SPM.

A <u>hypotonic solution</u> is a solution that has a higher concentration of solutes inside the cell than outside of the cell. Thus the movement of water is from outside to the inside of the cell.

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