Pharmacology and the Nursing Process Practice Exam 2025 – The Comprehensive All-in-One Guide to Master Your Exam!

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How do vasodilators work to lower blood pressure?

By blocking adrenergic receptors

By causing relaxation of arteriolar and/or venous smooth muscle

Vasodilators work by causing relaxation of arteriolar and/or venous smooth muscle, allowing more blood to flow through the blood vessels, which in turn lowers blood pressure. Option A and D are incorrect because they both involve blocking, not relaxing, which is the opposite of what vasodilators do. Option C is also incorrect because increasing plasma volume would actually increase blood pressure, not lower it.

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By increasing plasma volume

By blocking calcium channels

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