In the neuromuscular junction, the response of the motor end plate to the release of acetylcholine is to open cation channels.Cations then enter the muscle cell, resulting in
A) hyperpolarization.
B) vesicle fusion with the membrane.
C) depolarization.
D) the closing of chemically gated channels.
E) the release of more acetylcholine.

Question

Quizplus · Accepted Answer

The influx of cations (such as sodium) into the muscle cell results in depolarization of the membrane potential, which triggers muscle contraction.

Therefore, the correct answer is:
C) depolarization.

In the Neuromuscular Junction, the Response of the Motor End