How Do Receptors Function in Cellular Communication?
Receptors are specialized proteins located on the cell surface or within the cell. They bind to signaling molecules and trigger a series of intracellular events. There are several types of receptors, including:
- G-protein-coupled receptors (GPCRs): These receptors activate intracellular signaling pathways through the binding of G-proteins. - Ion channel-linked receptors: These receptors open or close ion channels in response to a ligand, altering the cell's membrane potential. - Enzyme-linked receptors: These receptors have intrinsic enzymatic activity or are associated with enzymes and initiate signaling cascades upon ligand binding.
