The use of beta 2 antagonist drugs may be useful in asthma because
A) they may increase constriction of the skeletal muscle of the chest wall.
B) they may increase heart rate and therefore allow the patient to get more oxygen circulated.
C) they may dilate the bronchioles by relaxing their smooth muscle.
D) they may override the beta blockers that the patient is already taking.
E) they may obstruct all G protein-mediated receptors.
Answer: C