Question

which of the following medications relaxes muscle spasms in the bronchial tube? a expectorant b bronchodilator c antitussive d antihistamine

Explanation:

Expectorants help with mucus - thinning, antitussives suppress coughs, antihistamines block histamine effects. Bronchodilators work by relaxing the smooth muscles in the bronchial tubes, thus relieving muscle spasms and widening the airways.

Answer:

B. bronchodilator