The entrance of _______ into the presynaptic neuron triggers the release of a neurotransmitter.
A)sodium ions
B)potassium ions
C)electrons
D)calcium ions

Question

Quizplus · Accepted Answer

The correct answer is D, calcium ions. When an action potential reaches the presynaptic neuron, voltage-gated calcium channels are opened, allowing calcium ions to enter the neuron. This increase in calcium concentration triggers the release of neurotransmitter from vesicles in the presynaptic neuron.

The Entrance of _______ into the Presynaptic Neuron Triggers the Release