Sympathetic activation leads to
A) relaxation in skeletal muscle of bronchioles, causing bronchodilation.
B) contraction of smooth muscles of bronchioles, causing bronchoconstriction.
C) relaxation in smooth muscles of bronchioles, causing bronchodilation.
D) relaxation of smooth muscles of bronchioles, resulting in bronchoconstriction.
E) contraction of smooth muscles of bronchioles, causing bronchodilation.

Question

Quizplus · Accepted Answer

Sympathetic activation leads to relaxation in smooth muscles of bronchioles, causing bronchodilation. This is because sympathetic activation leads to the release of epinephrine and norepinephrine, which bind to beta-2 adrenergic receptors in the smooth muscles of the bronchioles, causing relaxation and dilation of the airways.

Sympathetic Activation Leads to