action potential reaches synaptic knob, voltage-gated Ca2+ channels open in pre-synaptic membrane, Ca2+ enters pre-synaptic neurone, vesicles with acetylcholine move towards & fuse with pre-synaptic membrane, ACh released by exocytosis, ACh diffuses across synaptic cleft and..., ...binds to receptors on post-synaptic membrane, ligand-gated) Na+ channels open and Na+ enters post-synaptic neurone, depolarisation occurs, acetylcholinesterase breaks down and recycles ACh

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