ATI RN
Cardiovascular Drug Therapy Questions
Question 1 of 5
Mechanism of action of levamisole is:
Correct Answer: D
Rationale: The correct answer is D: Increase the number of T-cells. Levamisole is an immunomodulatory drug that works by stimulating the production and proliferation of T-cells in the immune system. This mechanism helps in enhancing the immune response against pathogens and cancer cells. Explanation for other choices: A: Inhibiting CD3 receptor is not the mechanism of action of levamisole. B: Complement-mediated cytolysis of T lymphocytes is not related to the action of levamisole. C: Levamisole does not substitute for patient's deficient immunoglobulins; it works by increasing T-cell count.
Question 2 of 5
The major side effect of cholestyramine is hepatotoxicity. This consideration is:
Correct Answer: B
Rationale: Step-by-step rationale: 1. Cholestyramine is a bile acid sequestrant used to lower cholesterol. 2. The major side effects of cholestyramine are gastrointestinal disturbances, not hepatotoxicity. 3. Therefore, the statement that hepatotoxicity is a major side effect is FALSE. 4. Option B is the correct answer as it accurately reflects the lack of hepatotoxicity with cholestyramine. Summary: - Option A is incorrect because hepatotoxicity is not a major side effect of cholestyramine. - Option C "All" is incorrect as it implies that all statements are true, which is not the case. - Option D "None" is incorrect as there is a major side effect associated with cholestyramine, just not hepatotoxicity.
Question 3 of 5
Recommended phosphorus daily allowance is:
Correct Answer: A
Rationale: The correct answer is A (900-1200 mg) because phosphorus is an essential mineral required for various bodily functions like bone health and energy metabolism. The recommended daily allowance varies depending on age, gender, and health status, but generally falls within the range of 900-1200 mg for adults. Choice B (600-900 g) is incorrect because this amount is too high for phosphorus intake and could lead to potential health issues. Choice C (25 g) is incorrect as it is an extremely high amount of phosphorus intake, far exceeding the recommended daily allowance and could be harmful to health. Choice D (1.5-4 mg) is incorrect because this amount is too low for phosphorus intake and would not meet the body's daily requirements for this essential mineral.
Question 4 of 5
The drug decreases calcium excretion in urine:
Correct Answer: A
Rationale: The correct answer is A: Hydrochlorothiazide (HydroDiuril). It is a thiazide diuretic that inhibits sodium reabsorption in the distal convoluted tubule, leading to decreased calcium excretion in urine. Amiloride (B) inhibits sodium reabsorption in the collecting duct but does not affect calcium excretion. Furosemide (C) acts on the loop of Henle to inhibit sodium and calcium reabsorption, increasing calcium excretion. Acetazolamide (D) is a carbonic anhydrase inhibitor that increases calcium excretion by causing metabolic acidosis and reducing calcium reabsorption.
Question 5 of 5
Which of the following drugs is a gastric acid resistant:
Correct Answer: B
Rationale: The correct answer is B: Penicillin V. Penicillin V is gastric acid-resistant due to its stability against the acidic environment of the stomach, allowing it to be absorbed intact in the intestine. Penicillin G (choice A) is not acid-resistant and is inactivated by gastric acid. Carbenicillin (choice C) and Procain penicillin (choice D) are not designed to be acid-resistant and would be inactivated in the stomach as well. Penicillin V is the only option that can withstand the acidic conditions of the stomach, making it the correct choice in this scenario.