Pharmacology and the Nursing Process by Linda Lane Lilley: Practice Exam

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Prepare for the Pharmacology and the Nursing Process exam with comprehensive quizzes and study tools. Master key concepts through engaging questions, answers, and detailed explanations to boost your confidence and knowledge for the exam!

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What is the primary action of direct-acting vasodilators?

They increase heart rate.
They cause peripheral vasodilation.
They decrease blood sugar levels.
They improve renal function.

The correct answer is: They cause peripheral vasodilation.

Direct-acting vasodilators work directly on smooth muscle cells in the walls of blood vessels, causing them to relax and widen. This results in peripheral vasodilation, or a decrease in blood pressure. Options A, C, and D are incorrect because they describe actions that are not associated with direct-acting vasodilators. Option A suggests increasing heart rate, but vasodilators actually decrease heart rate as a result of decreased blood pressure. Option C mentions decreasing blood sugar levels, which is not a known effect of direct-acting vasodilators. Option D mentions improving renal function, but this is not the primary action of direct-acting vasodilators.