Drugs, Brain, & Behavior: Exam 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 instrumental or classical conditioning. Bioavailability - Answer Concentration of drug present in the blood that is free to bind to specific target sites.