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The chemical messenger of the body is a neurotransmitter. They are chemicals that carry signals between neurons or from neurons to muscles. In the synaptic cleft, impulses are exchanged between two neurons.

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bini Paul

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7mo ago
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Wiki User

11y ago

A neurotransmitter is a chemical in the brain which causes receptors on neurons to fire.

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Q: What is the best definition for a neurotransmitter?
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