Exocytosis of neurotransmitter into the synaptic cleft is triggered by an influx of ______ in response to the arrival of an action potential in the axon terminal. A) K⁺ B) Na⁺ C) Ca²⁺ D) ATP E) Cl^-

Question

Quizplus · Accepted Answer

The influx of calcium ions (Ca2+) triggers the exocytosis of neurotransmitter into the synaptic cleft in response to the arrival of an action potential in the axon terminal. Option A, B, D, and E are incorrect because they do not play a role in triggering exocytosis of neurotransmitters.

Exocytosis of Neurotransmitter into the Synaptic Cleft Is Triggered by an Influx