A serotonin receptor is a type of protein found on the surface of cells that binds to the neurotransmitter serotonin. These receptors 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, each with distinct roles and locations in the body. When serotonin binds to its receptors, it can trigger different responses depending on the receptor type. This interaction is essential for maintaining mental health, and imbalances in serotonin levels or receptor function are often linked to conditions like depression and anxiety. Understanding serotonin receptors helps researchers develop targeted treatments for these disorders.