Cell receptors

Cell receptors are specialized proteins located on the surface of cells or within them that receive signals from outside the cell. These signals can be hormones, neurotransmitters, or other molecules. When a signal binds to a receptor, it triggers a response inside the cell, such as growth, immune responses, or changes in metabolism. This interaction is crucial for cells to communicate and respond appropriately to their environment, influencing various bodily functions and processes. Essentially, cell receptors act like a lock that only opens in response to the right key (the signaling molecule).