NEUROTRANSMITTER

Neurotransmitter

Neurotransmitters are endogenous chemicals that transmit signals from a neuron to a target cell across a synapse. Neurotransmitters are packaged into synaptic vesicles clustered beneath the membrane in the axon terminal, on the presynaptic side of a synapse. They are released into and diffuse across the synaptic cleft, where they bind to specific receptors in the membrane on the postsynaptic side of the synapse. Release of neurotransmitters usually follows arrival of an action potential at the synapse, but may also follow graded electrical potentials. Low level "baseline" release also occurs without electrical stimulation. Many neurotransmitters are ...

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neurotransmitter

Noun

  1. Any substance, such as acetylcholine or dopamine, responsible for sending nerve signals across a synapse between two neurons.


The above text is a snippet from Wiktionary: neurotransmitter
and as such is available under the Creative Commons Attribution/Share-Alike License.

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