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siniylev [52]
3 years ago
7

Question 14

Biology
1 answer:
Whitepunk [10]3 years ago
8 0

Answer:

is A.

Explanation:

When an action potential reaches the axon terminal, it depolarizes the membrane and opens voltage-gated Na+ channels. Na+ ions enter the cell, further depolarizing the presynaptic membrane. ... Fusion of a vesicle with the presynaptic membrane causes neurotransmitters to be released into the synaptic cleft.

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When acetylcholine binds to receptors at the motor end plate, the end plate membrane becames:__________a. repolarized. b. more p
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Answer:

d. more permeable to sodium ions.

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If  the  stimulus is up to threshold levels; more chemical(neurotransmitter) gated sodium channels opens, and sodium ions move into the  synapse to depolarize the membrane with  reversal of charges to generate action potential.

The continuous  binding of Acetycholine , leads to permanent opening of sodium ions,and over excitation from depolarization.  Acetycholinesterase enzymes breakdown Acetycholine to choline  and Acetyl Co -A. These are recycle back to Acetycholiine

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Vinvika [58]

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