Cell surface receptors

Cell surface receptors are specialized proteins located on the outer membrane of cells that act as communication gateways. They detect signals such as hormones, neurotransmitters, or environmental cues, and then trigger internal responses within the cell. By binding to specific molecules, these receptors help cells respond appropriately to changes or signals in their environment, coordinating activities like growth, immune responses, or energy use. Think of them as locks that only specific keys (signaling molecules) can fit into, ensuring precise communication between the cell and its surroundings.