BIOL 1550 Lecture Notes - Lecture 5: Cardiac Arrhythmia, Crack Cocaine, Nasal Septum
Document Summary
Half-life-how long it takes for half of the drug to exit the body. Takes 5 half-lives to reach plateau when giving dose at each life. Hallucinogens-marijuana, ecstasy, lsd, pcp (change in the way we interact with our environment) Dopamine pathway in cns activated by pleasurable stimuli all recreational drugs stimulate this area of the brain (makes us feel good-releases dopamine) amount of da links to potential for abuse intensity of release=intensity of addiction. Use of a drug in a fashion that is inconsistent with medical or social norms . Disease process characterized by the continued use of a specific psychoactive substance despite physical, psychological or social harm . Tolerance: increased dose is required to achieve the desired effect. Physical dependence: physiologicl changes in the body such that drug is required for homeostasis. Withdrawal: collection of negative symptoms initiated by cessation of a drug.
