Activation of the Beta₂-Adrenergic Receptors of the Airway

Question

Activation of the beta₂-adrenergic receptors of the airway
A) causes laryngospasm.
B) constricts the bronchioles.
C) restricts air flow.
D) causes bronchodilation.

Accepted Answer

Activation of the beta₂-adrenergic receptors of the airway causes bronchodilation. This leads to relaxation of the smooth muscle around the bronchioles and increased air flow. Therefore, options A, B, and C are incorrect.