The functions of serotonin receptors are diverse and depend on their location and subtype. In the central nervous system, they are involved in regulating mood, anxiety, and sleep. In the gastrointestinal tract, they regulate bowel movements and secretion. In blood vessels, they control vascular tone. Each subtype of serotonin receptor has specific functions; for example, 5-HT1A receptors are involved in mood regulation, while 5-HT3 receptors are involved in nausea and vomiting.
