Voltage-gated calcium ion channels that function in neurotransmission are primarily found on the:
A) postsynaptic membrane.
B) presynaptic membrane.
C) synaptic vesicles.
D) dendrites.

Question

Quizplus · Accepted Answer

Voltage-gated calcium ion channels are primarily found on the presynaptic membrane, where they are responsible for triggering the release of neurotransmitters. This occurs when an action potential reaches the presynaptic terminal, causing the calcium channels to open and allowing calcium ions to enter the cell. The rise in intracellular calcium then triggers the fusion of synaptic vesicles with the presynaptic membrane, releasing neurotransmitters into the synaptic cleft.

Voltage-Gated Calcium Ion Channels That Function in Neurotransmission Are Primarily