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5-hydroxytryptamine (5-hy-DROK-see-TRIP-tuh-meen)

 A hormone found in the brain, platelets, digestive tract, and pineal gland. It acts both as a neurotransmitter (a substance that nerves use to send messages to one another) and a vasoconstrictor (a substance that causes blood vessels to narrow). A lack of 5-hydroxytryptamine in the brain is thought to be a cause of depression. Also called serotonin.



Previous Definitions:5-fluoro-2-deoxycytidine, 5-fluorouracil, 5-FU, 5-HT3 receptor antagonist, 5-hydroxyindoleacetic acid
Next Definitions:5-hydroxytryptamine 3 receptor antagonist, 506U78, 5Q minus syndrome, 5Q- syndrome, 6-hydroxymethylacylfulvene

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