Pharmacology Chapter 5 Questions and Correct Answers | Latest Update | A+

Pharmacodynamics Ans: the study of the biochemical and physiologic effects of drugs and the molecular mechanisms by which those effects are produced *the study of what drugs do to the body and how they do it Dose-Response Relationship definition Ans: relationship between the size of an administered dose and the intensity of the response produced -determines the minimum amount of drug we can use -the maximum response a drug can elicit -how much we need to increase the dosage in order to produce the desired increase in response Dose-Response Relationship Ans: as the dosage increases the response become larger -therapeutic responses can be adjusted to fit each patient's needs because it is graded -to tailor treatment all we do is lower or increase the dosage until the desired intensity is achieved Phases of Dose-Response Ans: *phase 1- occurs at low doses -the curve is flat because doses are too low to elicit responses *phase 2- an increase in dose elicits an increase in response -this is the phase during which the dose-response is graded *phase 3- as the dose goes higher there is a point in which an increase in dose is unable to elicit any further increase in response and the curve flattens What characteristics does the dose-response curve reveal? Ans: 1. maximal efficacy and 2. relative potency Maximal Efficacy Ans: the largest effect that a drug can produce indicated by the height of the dose-response curve -we don't always want this, we need to match to the patie