Specializing in Canine and Feline 
Neurology and Neurosurgery since 1986

neurotransmitter

Chemical substance (norepinephrine, acetylcholine, dopamine, etc.) that transmits electrical impulses between neurons; released from the axon terminal of a presynaptic neuron when excited and travels across the synaptic cleft to either excite or inhibit the target cell.

Related Words

acetylcholine (Ach) ; axon ; dopamine ; neuron ; norepinephrine ; synapse