neurotransmittereducation dictionary

A chemical released by neurones to relay information to other cells.

(14 Jan 2009)

neurotransmittermedical dictionary

Any of a group of substances that are released on excitation from the axon terminal of a presynaptic neurone of the central or peripheral nervous system and travel across the synaptic cleft to either excite or inhibit the target cell. Among the many substances that have the properties of a neurotransmitter are acetylcholine, noradrenaline, adrenaline, dopamine, glycine, y aminobutyrate, glutamic acid, substance P, enkephalins, endorphins and serotonin.

This entry appears with permission from the Dictionary of Cell and Molecular Biology

(11 Mar 2008)