Action of serotonin on smooth muscles

Serotonin causes contraction of the smooth muscles of the vas deferens and of a strip of stomach from rats by its action on D-serotonin receptors. Only a small part (about 10–14%) of its contractile effect is due to liberation of endogenous catecholamines. The action of serotonin on a strip of rat stomach is accompanied by increased entry of isotropes45Ca… CONTINUE READING