Triggering of the muscle action potential occurs after

Question

Quizplus · Accepted Answer

The muscle action potential is triggered when acetylcholine binds to chemically-gated channels in the motor end plate, causing depolarization of the muscle cell membrane and initiation of an action potential.

Note: option B is incorrect as acetylcholinesterase is an enzyme that breaks down acetylcholine and plays a role in terminating the action potential, but it is not involved in triggering it. Option C is incorrect as calcium ions play a role in the release of acetylcholine from the motor neuron, but they do not directly trigger the muscle action potential. Option D is incorrect as the action potential does not "jump" across the neuromuscular junction, but rather crosses it via diffusion of neurotransmitter molecules. Option E is incorrect as only option A is the correct answer.

Triggering of the Muscle Action Potential Occurs After