Psychopharmacology: Drugs, the Brain, and Behavior: Chapter 1 questions with correct answers

absorption - Answer Movement of a drug from the site of administration to the circulatory system. acute tolerance - Answer Rapid tolerance formed during a single administration of a drug, as is the case with alcohol. additive effects - Answer Drug interactions characterized by the collective sum of the two individual drug effects. affinity - Answer Attraction between a molecule and a receptor. area postrema - Answer Area in the medulla of the brain stem that is not isolated from chemicals in the blood. It is responsible for inducing a vomiting response when a toxic substance is present in the blood. astrocytes - Answer Star-shaped cells of the nerve tissue that have numerous extensions and that modulate the chemical environment around neurons, metabolically assist neurons, and provide phagocytosis for cellular debris. behavioral tolerance - Answer The reduced effectiveness of a drug administered chronically that involves learning: either instumental or classical conditioning. bioavailability - Answer Concentration of drug present in the blood that is free to bind to specific target sites.