Multiple choice

After presynaptic neurons are depolarized they:

  1. Release a neurotransmitter into the synapse

  2. Trigger an action potential within the synapse

  3. Produce acetylcholine in the cytoplasm

  4. Stimulate hyperpolarization
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A Correct answer
Explanation

When the presynaptic membrane depolarizes, voltage-gated calcium channels open, leading to an influx of calcium which triggers the exocytosis of neurotransmitters into the synaptic cleft.

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