1. Neurotransmitters into the synapse.
* In a synapse, two neurons are in contact, the presynaptic one (before the synapse) and one postsynaptic (post-synapse). * In the axon of the first are, among others, vesicles containing neurotransmitters *. * When a nerve impulse reaches the presynaptic axon opens vesicles in the synapse, which releases neurotransmitters.
neurotransmitter molecules then follow three paths:
-or they bind to postsynaptic receptors and allow the passage of nerve impulses,
-either they are recaptured by the presynaptic neuron * that store again in vesicles,
-or they are degraded in the synapse by specific enzymes *.
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