RT Book, Section A1 Ciccone, Charles D. SR Print(0) ID 1135034741 T1 Drug Receptors T2 Pharmacology in Rehabilitation YR 2016 FD 2016 PB F. A. Davis Company PP New York, NY SN 9780803640290 LK fadavisat.mhmedical.com/content.aspx?aid=1135034741 RD 2024/03/29 AB A receptor is a component on or within a cell that a substance can bind to.1 Most drugs exert their effect by binding to and activating one of these receptors.1 The receptors can be any cellular macromolecule, but many receptors have been identified as proteins or protein complexes that are located on or within the cell.1,2 When a drug binds to a receptor, it initiates a chain of biochemical events that brings about some change in the physiological function of the cell.