Of Those Listed, Which Event Occurs First Following a Depolarising

question 17

Multiple Choice

Of those listed, which event occurs first following a depolarising stimulus applied to the presynaptic membrane of an axon terminal?

• A) Voltage-gated calcium channels in the membrane open.
• B) Synaptic vesicles fuse with the membrane.
• C) The postsynaptic cell produces an action potential.
• D) Ligand-gated channels open, allowing neurotransmitters to enter the synaptic cleft.

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