Which action best describes how an angiotensin-converting enzyme inhibitor lowers blood pressure?
Correct answer: A. It reduces formation of angiotensin II and aldosterone
- A. It reduces formation of angiotensin II and aldosterone
- B. It blocks calcium entry into cardiac muscle cells
- C. It increases sodium loss through the renal tubules
- D. It directly relaxes bronchial smooth muscle
Explanation
ACE inhibitors reduce angiotensin II formation, causing vasodilation and reduced aldosterone secretion. The other options describe calcium-channel blockers, diuretics and bronchodilators rather than ACE inhibitors.
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About Cardiovascular and Respiratory Drugs
Cardiovascular and respiratory drugs include antihypertensives, diuretics, antianginal agents, antiarrhythmics, cardiac glycosides, anticoagulants, bronchodilators, corticosteroids and cough medicines. Questions focus on mechanisms, indications, contraindications, toxicity and monitoring, especially the difference between drugs that reduce blood pressure, improve cardiac output or open narrowed airways.
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