Which of the following statements best explains why Propranolol is Contraindicated in Patients with Asthma?
A. It selectively blocks beta-2 receptors in cardiac tissue, causing bronchoconstriction.
B. It non-selectively antagonizes beta-1 and beta-2 receptors, which can precipitate bronchospasm by blocking beta-2-mediated bronchodilation.
C. It selectively stimulates beta-2 receptors in bronchial smooth muscle, leading to paradoxical bronchospasm.
D. It enhances beta-2 receptor activity in the lungs, causing increased airway resistance.
B
B
B
Option B
B
Option B