When an action potential arrives at an axon terminal,it causes the opening of _______ channels,which triggers fusion of neurotransmitter vesicles with the cell membrane.
A) sodium
B) chloride
C) calcium
D) potassium
E) acetylcholine

Question

Quizplus · Accepted Answer

Calcium channels open upon arrival of an action potential, allowing calcium ions to flow into the axon terminal. This influx of calcium triggers the fusion of neurotransmitter-containing vesicles with the cell membrane, releasing the neurotransmitters into the synaptic cleft.

When an Action Potential Arrives at an Axon Terminal,it Causes