Related topics: brain

Mother roundworms have ultra-protective instincts

Talk about motherly instincts! Biologists at the University of Iowa have learned that female roundworms can alert their future offspring of dangers they will encounter when born, and the mothers pass on these warnings even ...

Neurotransmitters in an instant

Dopamine, serotonin, adrenalin... The smooth functioning of the human brain depends on their correct proportions. Any disturbances mean diseases. That's why it's so important to be able to detect these disturbances as early ...

Human medicines affect fish behavior

Human medicines that act on important signal systems in the brain make fish bolder, shows a new study on three-spined sticklebacks by researchers at Linköping University. The results reinforce that the signal substances ...

Stressed sheep fleeced for their genes

Genetics play a large factor in determining the temperament of sheep and how they react to stress, a study carried out by The University of Western Australia has found.

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Serotonin

"Serotonin" redirects here. For the professional wrestling stable, see Serotonin.

Serotonin (pronounced /ˌsɛrəˈtoʊnən/) is a monoamine neurotransmitter. It is found extensively in the gastrointestinal tract of animals, and about 80 to 90 percent of the human body's total serotonin is located in the enterochromaffin cells in the gut, where it is used to regulate intestinal movements. The remainder is synthesized in serotonergic neurons in the central nervous system (CNS) where it has various functions, including control of appetite, mood and anger.

Serotonin is found not only in animals, but also in fungi and plants, including fruits and vegetables.

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