ATI PHARMACOLOGY PRACTICE QUESTIONS WITH ANSWER KEYS

ATI PHARMACOLOGY PRACTICE QUESTIONS WITH ANSWER KEYS 1. A patient with a history of heart failure is prescribed a loop diuretic. Which of the following statements best explains the mechanism of action of loop diuretics and the potential impact on electrolyte balance? a. Loop diuretics inhibit aldosterone production, leading to increased sodium reabsorption. b. Loop diuretics act on the proximal tubule, promoting the excretion of potassium and water. c. Loop diuretics block sodium and chloride reabsorption in the ascending loop of Henle, causing a loss of potassium, calcium, and magnesium. d. Loop diuretics stimulate the release of antidiuretic hormone (ADH), resulting in enhanced water retention. 2. A patient is prescribed a beta-blocker for the management of hypertension. Which of the following statements accurately describes the pharmacodynamics of beta-blockers and their potential effects on the cardiovascular system? a. Beta-blockers increase heart rate and contractility by blocking beta-1 receptors. b. Beta-blockers dilate blood vessels by antagonizing alpha receptors in vascular smooth muscle. c. Beta-blockers reduce heart rate and myocardial contractility by blocking beta-2 receptors. d. Beta-blockers enhance sympathetic nervous system activity, leading to increased cardiac output. 3. A nurse is caring for a patient receiving a continuous infusion of heparin. What assessment finding indicates a potential complication related to heparin therapy? a. Increased blood pressure. b. Prolonged activated partial thromboplastin time (aPTT). c. Elevated platelet count. d. Decreased international normalized ratio (INR). 4. A patient is prescribed a selective serotonin reuptake inhibitor (SSRI) for the treatment of depression. The nurse should monitor the patient for signs and symptoms of serotonin syndrome. Which of the following manifestations is associated with serotonin syndrome? a. Hypertension and tachycardia. b. Hyperthermia, confusion, and myoclonus. c. Respiratory depression and bradycardia. d. Extrapyramidal symptoms and muscle rigidity. 5. A patient with type 2 diabetes is prescribed metformin. The nurse should educate the patient about potential adverse effects and the importance of monitoring for signs of lactic acidosis. Which of the following conditions increases the risk of metformin-induced lactic acidosis? a. Hypothyroidism. b. Chronic kidney disease. c. Hyperlipidemia. d. Gastrointestinal bleeding. ANSWER KEY 1. Answer: c. Loop diuretics block sodium and chloride reabsorption in the ascending loop of Henle, causing a loss of potassium, calcium, and magnesium. 2. Answer: c. Beta-blockers reduce heart rate and myocardial contractility by blocking beta-2 receptors. 3. Answer: b. Prolonged activated partial thromboplastin time (aPTT). 4. Answer: b. Hyperthermia, confusion, and myoclonus. 5. Answer: b. Chronic kidney disease.