Serotonin: Approximately 90% of the human body's total serotonin is located in the enterochromaffin cells in the alimentary canal (gut), where it is used to regulate intestinal movements.[7][8] the remainder is synthesized in serotonergic neurons of the cns, where it has various functions. These include the regulation of mood, appetite, and sleep. Ien.Wikipedia.Org/wiki/serotonin.
Answered 11/14/2013
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