When an action potential reaches an axon terminal,___ enters the cell and triggers the release of neurotransmitter.
A)sodium
B)potassium
C)chloride
D)calcium

Question

Quizplus · Accepted Answer

When an action potential reaches an axon terminal, voltage-gated calcium channels open and calcium ions enter the axon terminal. This influx of calcium triggers the release of neurotransmitter into the synaptic cleft.

When an Action Potential Reaches an Axon Terminal,___ Enters the Cell