What triggers the release of a neurotransmitter from the presynaptic neuron vesicles?
A)Sodium ions
B)Potassium ions
C)Electrons
D)Calcium ions

Question

Quizplus · Accepted Answer

The release of a neurotransmitter from the presynaptic neuron vesicles is triggered by an influx of calcium ions into the presynaptic terminal. The action potential arriving at the presynaptic terminal depolarizes the membrane and opens voltage-gated calcium channels, causing Ca2+ influx into the terminal. The Ca2+ influx triggers the fusion of synaptic vesicles with the presynaptic membrane and releases the neurotransmitter into the synaptic cleft.

What Triggers the Release of a Neurotransmitter from the Presynaptic