| Description: |
2 or 3 and , However, In this sense, When such chemical-signals couple or bind to a receptor, a change in the electrical-activity of a cell, acetylcholine, am olfactory receptor is a protein-molecule that recognizes and responds to , an acetylcholine-receptor recognizes and responds to its endogenous-ligand, chemokinesor cytokines e, e, sometimes in pharmacology, such as enzymes, the term is also used to include other proteins that are drug-targets, they cause some form of cellular/tissue-response, transporters and ion-channels, The receptors are ligand binding factors of type 1, endogenous-chemical signals, g, g, protein-molecules , that receive chemical-signals from outside a cell |