The action potential on the axon at a neuromuscular junction A) Opens ryanodine-sensitive channels on the SR m embrane B) Increases cytoplasmic [Ca²⁺] in the terminal by opening voltage-gated Ca²⁺ cha nn els C) Opens the DHPR on the T-tubule D) Is conveyed electrotonically to the muscle mem brane E) Both A and C are correct

Question

Quizplus · Accepted Answer

The action potential on the axon at a neuromuscular junction increases cytoplasmic [Ca²⁺] in the terminal by opening voltage-gated Ca²⁺ channels, which is essential for neurotransmitter release.

The Action Potential on the Axon at a Neuromuscular Junction