RT Book, Section A1 Katzung, Bertram G. A1 Kruidering-Hall, Marieke A1 Trevor, Anthony J. SR Print(0) ID 1156527456 T1 Drug Metabolism T2 Katzung & Trevor's Pharmacology: Examination & Board Review, 12e YR 2019 FD 2019 PB McGraw-Hill Education PP New York, NY SN 9781259641022 LK accessmedicine.mhmedical.com/content.aspx?aid=1156527456 RD 2024/03/29 AB All organisms are exposed to foreign chemical compounds (xenobiotics) in the air, water, and food. To ensure elimination of pharmacologically active xenobiotics and to terminate the action of many endogenous substances, evolution has provided metabolic pathways that alter such compounds’ activity and their susceptibility to excretion.