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1) Nerve impulse
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arrives causing
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influx of Ca+2
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5)
Neurotransmitter is
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broken down or
removed
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from the synapse
to allow
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the next
transmission.
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ACh-ase, MAO
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Reuptake
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2) Ca+2
promotes
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the exocytosis of
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synaptic
vesicles.
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3)
Neurotransmitter
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diffuses across
the
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synapse to attach
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to postsynaptic
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receptors.
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Chemically-gated
ion channels
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