Serotonin receptors are proteins located on the surface of cells that bind to the neurotransmitter serotonin. They play a crucial role in transmitting signals in the brain and throughout the body, influencing various functions such as mood, appetite, and sleep. There are several types of serotonin receptors, classified into different families, each with unique roles and effects. These receptors are involved in many physiological processes and are targets for various medications. For example, antidepressants often work by affecting serotonin levels and receptor activity, helping to alleviate symptoms of depression and anxiety. Understanding serotonin receptors is essential for developing treatments for mental health disorders.