| Front | Describe transmission across a cholinergic synapse. |
|---|---|
| Back | - action potential at presynaptic terminal - Ca2+ channels open - Ca2+ diffuse in - vesicles move to and fuse with presynaptic membrane - release acetylcholine by exocytosis - acetylcholine diffuses across synaptic cleft - binds to specific Na+ channel receptors on postsynaptic membrane - chemically gated Na+ channels open - Na+ diffuses into postsynaptic neurone - depolarisation occurs - if threshold value is reached, action potential forms |
Tags: nerves
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