Alpha adrenergic blockers cause which primary effect?

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Prepare for the Rasmussen Pharmacology Exam 3. This quiz includes multiple-choice questions with hints and explanations. Review essential pharmacological concepts and get ready for your exam!

Multiple Choice

Alpha adrenergic blockers cause which primary effect?

Explanation:
Blockade of alpha-1 receptors on vascular smooth muscle prevents norepinephrine from triggering constriction, so vessels relax and dilate. This vasodilation lowers systemic vascular resistance and blood pressure, which is the main effect of alpha-adrenergic blockers. The result is a reduced afterload and potential reflex changes like a slight increase in heart rate, but bronchodilation would come from beta-2 effects, and renin release isn’t the primary outcome of alpha-1 blockade.

Blockade of alpha-1 receptors on vascular smooth muscle prevents norepinephrine from triggering constriction, so vessels relax and dilate. This vasodilation lowers systemic vascular resistance and blood pressure, which is the main effect of alpha-adrenergic blockers. The result is a reduced afterload and potential reflex changes like a slight increase in heart rate, but bronchodilation would come from beta-2 effects, and renin release isn’t the primary outcome of alpha-1 blockade.

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