Which action explains how losartan lowers blood pressure?
Correct answer: A. It blocks angiotensin II receptors and reduces vasoconstriction
- A. It blocks angiotensin II receptors and reduces vasoconstriction
- B. It inhibits calcium entry into bronchial smooth muscle
- C. It increases sodium retention in the renal tubules
- D. It stimulates beta-1 receptors to increase cardiac output
Explanation
Losartan is an angiotensin II receptor blocker, so it reduces vasoconstriction and aldosterone release. It does not directly stimulate the heart or act as a bronchodilator.
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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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