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

What action does albuterol have?

1. Beta1 receptor blocker

2. Beta2 receptor agonist

3. Alpha2 receptor antagonist

4. Beta3 receptor agonist

The correct answer is: Beta2 receptor agonist

Albuterol is a medication commonly used to treat asthma and other respiratory conditions. It works as a bronchodilator by relaxing the muscles in the airways, making it easier to breathe. This action is achieved by stimulating beta2 receptors, which causes them to widen the airways and increase air flow. Option A, a beta1 receptor blocker, would have the opposite effect and actually worsen respiratory symptoms. Option C, an alpha2 receptor antagonist, works on a different type of receptor and would not have the intended effect on airway muscle relaxation. Option D, a beta3 receptor agonist, may have some bronchodilating effects, but it is not commonly used for this purpose. Therefore, the best answer is option B, as it accurately describes the mechanism of action of albuterol.