A stimulus traveling toward a synapse appears to open calcium ion channels at the presynaptic end, which in turn promotes fusion of synaptic vesicles to the axonal membrane.

Question

Quizplus · Accepted Answer

This statement is true. When a stimulus arrives at a synapse, it triggers the opening of calcium ion channels on the presynaptic membrane. The influx of calcium ions promotes the fusion of synaptic vesicles with the membrane, causing the release of neurotransmitters into the synapse.

A Stimulus Traveling Toward a Synapse Appears to Open Calcium