Via Top Health News -- ScienceDaily
In our brain, information is passed from one neuron to the next at a structure called synapse. At a chemical synapse, a chemical is released from the signal-sending neuron or presynaptic neuron. This neurotransmitter then crosses the synaptic cleft to bind to receptors in the target neuron or postsynaptic neuron. An extensive molecular machinery is at work: for example, vesicles filled with neurotransmitter dock at 'docking sites' in the pre-synaptic active zone before they fuse and release the neurotransmitter into the synapse.
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