An action potential enters the presynaptic terminal, then _____________ channels

Question

An action potential enters the presynaptic terminal, then _____________ channels open and ______ ions invade the synaptic terminal allowing synaptic vesicles of _____ to be released and diffuse across the synaptic cleft to bind to receptors on the postsynaptic membrane causing an excitatory response, thus resulting in _____ of the postsynaptic cell. Voltage-gated; calcium; glutamate; hyperpolarization Voltage-gated; potassium; glutamate; depolarization Voltage-gated; calcium; glutamate; depolarization Voltage-gated; potassium; glutamate; hyperpolarization None of the choices are correct

Explanation / Answer

An action potential enters the presynaptic terminal, then voltage gated channels open and calcium ions invade the synaptic terminal allowing synaptic vesicles of acetylcholine to be released and diffuse across the synaptic cleft to bind to receptors on the postsynaptic membrane causing an excitatory response, thus resulting in depolarization of the postsynaptic cell.

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