Cambridge Encyclopedia » Cambridge Encyclopedia Vol. 67

serotonin - Explanation, Biochemistry, Neurotransmission, Pharmacology, Modulating levels

A widely distributed chemical substance (a monoamine), particularly found in the blood, brain, and certain cells of the gut; it is also known as 5-hydroxytryptamine (5-HT). It is synthesized from the amino acid tryptophan, plays an important part in haemostasis, and probably also acts as a neurotransmitter in the central nervous system. It is involved in sleep, emotional disposition (mood), prolactin secretion, and circadian rhythms.

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