NUR155 / NUR 155 Exam 4 (Latest 2024 / 2025): Foundations of Nursing - Galen

NUR 155 Foundations of Nursing - Galen College of Nursing Exam 4 Question: Define drug tolerance Answer: A unusually low physiological response to a drug and requires increases in the dosage to maintain a given therapeutic effect. Question: Define drug half-life Answer: the time required for the amount of drugs in the body to decrease by 50% of what it was at initial administration. Question: What are the key terms related to drug actions? What do these mean? Pharmacodynamics, receptor, agonist, antagonist? Answer: -Pharmacodynamics- the mechanism of drug action and the relationships between drug concentration and responses in the body. -Receptor-the drugs specific target -Agonist- when a drug produces the same response as the physiological or endogenous substance. -Antagonist- a drug that inhibits cell function by occupying receptor sites. Question: What is Pharmacokinetics? Answer: -Absorption:process in which a drug passes into the bloodstream -Distribution: the transportation of a drug from its site of absorption to site of action. -Biotransformation: process by which a drug is converted to a less active form. EX. Metabolism or detoxification. -Excretion: process in which metabolites and drugs are eliminated from the body. Question: What are some developmental factors affecting medication action? Answer: -older adults: decreased liver and kidney function, taking multiple drugs resulting in incompatibilities, beta blockers can cause confusion and dizziness