Psychology 2020A/B Study Guide - Disulfiram, Tachycardia, Pharmacokinetics

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Distributed throughout body via circ system reaches site of action exerts effect leaves site of action metabolized typically to inactive form drug and its metabolites eliminated from body pharmacokinetics: what the body does to the drug (ex. administration, absorption, distribution, metabolism, elimination) pharmacodynamics: what the drug does to body, interaction of drugs with receptors at site of action. % of non ionized molecules determines rate of absorption digestive system lining ph 1. 5(acidic) 7(neutral) bases easily absrb unionized particles penetrate cell member better than ionized (less fat soluble) lipid solubility: lipid soluble penetrate more readily than non lipid ex. heroin more ls than morphine crosses faster brain 2% body weight receives 15 20% blood protected by blood brain barrier/permeability characteristics of capillaries restricted reduces diffusion of water soluble/ionized molecules doesn"t obstruct lipid soluble/un ionized molecules concept bbb paul ehrlich 1882 placenta similar to bbb access to fetal blood supply.