Answer :
Electrical signals direct the synaptic vesicles to release their neurotransmitters into the synapse.
Synaptic vesicles are the key organelles at the neuron terminals involved in synaptic transmission. They store neurotransmitters that are released in the synapses through an electrical impulse. A synapse is a gap between two neurons through which the electrical impulse is transferred from one neuron to another.
Directing synaptic vesicles through electrical impulses occurs by exocytosis. Exocytosis is observed to be a result of protein-protein interactions. Proteins of synaptic vesicles interact with the proteins of the plasma membrane of the pre-synaptic axon terminal and direct the synaptic vesicle to release neurotransmitters into the synapse.
We can thus say that neurons communicate through electrical impulses, often called action potentials, and chemical neurotransmitters released into the synapse.
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