When are vesicles containing neurotransmitters released into the synaptic cleft?

Question

Quizplus · Accepted Answer

Vesicles containing neurotransmitters are released into the synaptic cleft when Ca2+ levels rise within the axon terminal. This influx of Ca2+ triggers the fusion of the vesicles with the cell membrane, allowing the neurotransmitters to diffuse across the synaptic cleft and activate receptors on the postsynaptic neuron. The other options (B, C, and D) do not play a direct role in vesicle release.

When Are Vesicles Containing Neurotransmitters Released into the Synaptic Cleft