PRE-synaptic neuron. synapse (the “gap”). POST-synaptic neuron. pre-synaptic neuron. vesicle (bubble). neurotransmitter. axon terminal. synapse. receptor. post-synaptic neuron. 1. electrical signal moves down axon to axon terminal 2. vesicles move toward pre-synaptic membrane.
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1. electrical signal moves down axon to axon terminal
2. vesicles move toward pre-synaptic membrane
3. vesicle fuses with presynaptic membrane
this releases neurotransmitter molecules (purple balls) into the synapse
neurotransmitters cross the synapse
if they fall into a matching receptor, the postsynaptic neuron may fire
there can be different KINDS of neurotransmitters
and different kinds of RECEPTORS