events that occur at a chemical synapse
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step 5
ion channels open and allow ions to flow across membrane
step 1
nerve impulse arrives at a synaptic end bulb of the presynaptic neurons
step 3
Exocytosis of synaptic vesicles and release neurotransmitters
step 4
The neurotransmitter molecules diffuse across synaptic cleft and bind to neurotransmitter receptors in the postsynaptic neuron's plasma membrane
step 2
calcium channels open and calcium ions flow into synaptic bulb end
step 6
depolarization will occur