Adrenergic Agonists · Pharmacology

Isoproterenol is a potent agonist at which receptors?

  1. Alpha-1 and Alpha-2 only
  2. Alpha-1 only
  3. Beta-1 and Beta-2 only
  4. Alpha, Beta, and Dopaminergic
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Correct answer: Beta-1 and Beta-2 only

Isoproterenol is a non-selective beta agonist with almost no alpha activity. It increases cardiac output (Beta-1) while simultaneously decreasing peripheral resistance (Beta-2).

Difficulty: Medium Question 9 of 20

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