What is a receptor?

A receptor is a protein molecule located on the surface of a cell or within a cell that binds to specific molecules, such as hormones, neurotransmitters, or other signaling molecules. When a molecule binds to a receptor, it triggers a specific cellular response or signaling pathway. Receptors play a crucial role in cell communication and the regulation of various physiological processes in the body.

A receptor is a protein molecule located on the surface of a cell or inside the cell that receives chemical signals from outside the cell and triggers a specific response. Receptors are responsible for detecting and responding to a wide variety of stimuli, including hormones, neurotransmitters, growth factors, and drugs.

Receptors bind to specific ligands, which are molecules that fit into the receptor's binding site. When a ligand binds to a receptor, it triggers a conformational change in the receptor that activates the receptor's signaling pathway. This can lead to a variety of cellular responses, including changes in gene expression, protein synthesis, and cell metabolism.

Receptors are essential for communication between cells and for coordinating the activities of different cells in the body. They play a critical role in a wide variety of physiological processes, including hormone regulation, neurotransmission, and immune function.