Activation of Alpha-1 receptors in the vasculature causes which effect?

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Multiple Choice

Activation of Alpha-1 receptors in the vasculature causes which effect?

Explanation:
Activation of alpha-1 receptors on vascular smooth muscle causes constriction of peripheral arteries and arterioles. This immediate vasoconstriction raises systemic vascular resistance, increasing afterload and often pushing blood pressure higher. While venous constriction can influence preload, the direct, defining effect in the vasculature is peripheral vasoconstriction. Bronchoconstriction is mediated by other pathways, and the primary vascular action here is the narrowing of peripheral vessels.

Activation of alpha-1 receptors on vascular smooth muscle causes constriction of peripheral arteries and arterioles. This immediate vasoconstriction raises systemic vascular resistance, increasing afterload and often pushing blood pressure higher. While venous constriction can influence preload, the direct, defining effect in the vasculature is peripheral vasoconstriction. Bronchoconstriction is mediated by other pathways, and the primary vascular action here is the narrowing of peripheral vessels.

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