7TM (Seven Transmembrane) Receptors

7TM (Seven Transmembrane) receptors, also known as G protein-coupled receptors (GPCRs), are proteins embedded in cell membranes that detect signals like hormones, light, or neurotransmitters. They have seven segments that span the membrane, enabling them to sense external molecules. When a signal binds to the receptor, it activates internal pathways within the cell, triggering specific responses. These receptors are vital for many processes, including sight, smell, immune response, and mood regulation, making them crucial targets for many medications.