Adrenergic Antagonists · Pharmacology

What is the effect of beta-antagonists on the kidneys?

  1. Increased renin secretion
  2. Inhibition of renin release
  3. Direct stimulation of aldosterone synthesis
  4. Vasodilation of the afferent arteriole
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Correct answer: Inhibition of renin release

Renin release from the juxtaglomerular apparatus is stimulated by beta-1 receptors. Beta-blockers inhibit this process, which contributes to their antihypertensive effect by downregulating the Renin-Angiotensin-Aldosterone System (RAAS).

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