Question

1. which of the following are used to alleviate muscle spasms in the airways of the lungs?

expectorants
antihistamines
bronchodilators
corticosteroids

Explanation:

Expectorants help loosen mucus, antihistamines block histamine - related reactions, corticosteroids reduce inflammation. Bronchodilators work by relaxing the smooth muscles in the airways, thus alleviating muscle spasms in the air - ways of the lungs.

Answer:

C. Bronchodilators