SOLVED

71) You respond to the aid of a 19-year-old patient who is reported to have taken an overdose of a prescribed medication. She exhibits combativeness and severe tremors. Her blood pressure is 160/100, and her pulse is 132. Sinus tachycardia appears on her ECG. Which of the following classification of drugs is most likely to cause these symptoms? A) Benzodiazepines B) Amphetamines C) Opiates D) Barbiturates 72) Which class of antidysrhythmics characteristically blocks sodium influx during fast potential depolarization? A) I B) II C) III D) IV 73) With regard to the endocrine system, which of the following statements is NOT true? A) The pituitary gland is often called the “master gland.” B) The posterior pituitary hormones are actually synthesized in the hypothalamus. C) The hypothalamus and pituitary glands have no physical link. D) The hypothalamus controls many of the functions of the pituitary gland. 74) A new synthetic narcotic has been developed by the pharmaceutical industry. This drug, called Drug A, has three times the efficacy of an existing synthetic narcotic, Drug B. However, Drug B has twice the affinity for opiate receptor sites in the body as Drug A. Which drug will have the greater effect when administered at the same dosage? A) Drug A B) Drug B C) Cannot be determined by the information given D) Identical effects when administered at the same dosage 75) Part of the reason that tricyclic antidepressants (TCAs) have fallen somewhat out of favor to selective serotonin reuptake inhibitors (SSRIs) is because: A) SSRIs have the added advantage of also blocking norepinephrine and dopamine B) TCA overdoses have a cardiotoxic effect C) SSRIs have the added advantage of also blocking histamine and acetylcholine D) TCA overdoses often create a hypertensive crisis in patients 76) Beta-adrenergic antagonists reduce hypertension through all of the following effects, EXCEPT: A) Diminishing reflex tachycardia as a compensatory response B) Suppressing renin release from the kidneys C) A negative inotropic effect D) Reduction of peripheral vascular resistance through vasodilation 77) The relative therapeutic effectiveness of chemically comparable drugs is regarded as the: A) Bioassay of the drugs B) Relative efficacy of the drugs C) Bioequivalence D) Therapeutic index 78) Tachyphylaxis can best be described as: A) An unexpected increase in heart rate as a side effect of a drug B) An allergic reaction that occurs when a drug is administered for the first time C) Anaphylactoid episodes occurring due to cross-sensitivity D) Rapidly decreasing effects with repeated administration of a drug 79) Which of the following is NOT typically associated with Type I diabetes mellitus? A) Juvenile onset B) Inadequate insulin release from the beta cells of the pancreatic islets C) Insulin dependence D) Obesity 80) Which of the following is NOT one of the main sources of drugs? A) Heavy metals B) Synthetic materials C) Plants D) Animals