The main mechanism by which ephedrine helps in the treatment of asthma is that it
A)causes the smooth muscles surrounding bronchial passages to relax.
B)increases tension in the smooth muscles surrounding bronchial passages, thus increasing responsiveness of these muscles to demand.
C)increases the blood flow from the heart to the lungs by stimulating release of norepinephrine.
D)decreases heart rate and the force with which it pumps.

Question

Quizplus · Accepted Answer

Ephedrine works by causing the smooth muscles surrounding the bronchial passages to relax, which helps to open up the airways and make breathing easier for individuals with asthma. This action is similar to that of other bronchodilators used in the treatment of respiratory conditions.

The Main Mechanism by Which Ephedrine Helps in the Treatment