AP reaches presynaptic presyn depolarise cause calcium channels to open release neurotransmitter by exocytosis - very rapid - binds to postsynaptic receptors.
neurotransmitter removed after activation (enzymatic degradation)
Synapses with only one nerve are very rare
One neuron can recieve thousands of synapses, APs may arrive from more than one nerve and may cause increased excitation (EPSP) or increased inhibition (IPSP).
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