PSYC62H3 Study Guide - Kainic Acid, Pharmacogenomics, Neurotensin
Document Summary
Drug is a chemical that affects one or more biological processes, however not all chemicals can be considered drugs. Endogenous substances chemicals originating or produced within an organism that are used to carry out the normal biological functions in the body are not usually considered drugs. Exogenous substances drugs: but there have been endogenous substances that have been isolated, extracted and synthesized, and administered in its pure form to reverse neurological deficits. L-dopa is one of these substances, normally needed in regulatory brain functioning, is used to treat parkinson"s. Prostaglandins class of chemicals found throughout the body that play a vital role in almost every life process, including respiration, reproduction, and circulation. Concentration of drug at its site(s) of action + rate of accumulation at site(s) of action depend on both: Drug dose the quantitiy of drug administered at one time: usually calculated by unit of drug per unit of body weight of the organism. (mg/kg)
