TEST BANK FOR APPLIED PHARMACOLOGY FOR THE DENTAL HYGIENIST 7TH EDITION BY HAVELES DUE TO 30TH NOV.

Chapter 02: Drug Action and Handling Haveles: Applied Pharmacology for the Dental Hygienist, 7th Edition MULTIPLE CHOICE 1. A drug is defined as a biologically active substance that can modify: a. the environment. b. the pH of tissue. c. cellular function. d. immune response. ANS: C Correct: A drug can modify cellular function. A general understanding of drug action allows the dental hygienist to make informed decisions regarding possible drug interactions or adverse reactions for the patient. Incorrect choices: It is a concern that discarded drugs may be affecting the environment, but this is not the definition of a drug. Some drugs may have the capacity to modify body compartment pH; however, this is not the definition for a drug. Some drugs may have the capacity to modify the immune response, but this is not the definition of a drug. REF: Introduction | p. 11 OBJ: 2 2. In comparing two drugs, the dose-response curve for the drug that is more efficacious would: a. be closer to the y axis. b. be farther from the y axis. c. have a greater curve height. d. have a higher median effective dose (ED50). ANS: C Correct: Efficacy is an expression of maximum intensity of effect or response that can be produced by a drug. Incorrect choices: The other choices refer to indicators of drug potency, not efficacy. The potency of a drug is a function of the amount of drug required to produce an effect. The potency of drug is shown by the location of that drug’s curve along the log-dose axis (x axis). REF: Characterization of Drug Action (Efficacy) | p. 12 OBJ: 1 3. Administering a drug of greater potency is better because drugs of greater potency do not require as high a dose. a. Both parts of the statement are true. b. Both parts of the statement are false. c. The first part of the statement is true; the second part is false. d. The first part of the statement is false; the second part is true. ANS: D Correct: The first part of the statement is false, the second part is true. The absolute potency of a drug is immaterial as long as the appropriate dose is administered. If equally efficacious, both drugs will produce the same effect. NURSINGTB.COM Applied Pharmacology for the Dental Hygienist 7th Edition Haveles Test Bank NURSINGTB.COM Incorrect choices: Both meperidine and morphin