What is the role of bronchodilators in treating asthma?

• A. To reduce inflammation in the lungs
• B. To open narrowed airways
• C. To increase mucus production
• D. To prevent airway infections

Answer: (B)

Bronchodilators play a vital role in the management of asthma by acting primarily to open narrowed airways. They achieve this by relaxing the smooth muscles that line the bronchial tubes, which allows for wider air passage and thus improves airflow to and from the lungs. This is particularly important during an asthma attack or when symptoms such as wheezing and shortness of breath occur, as the airways become constricted.

While reducing inflammation is also a crucial aspect of asthma management, particularly with the use of corticosteroids, bronchodilators specifically target the immediate symptoms by providing rapid relief from airway constriction. Similarly, increasing mucus production or preventing infections is not the function of bronchodilators; instead, their primary function is to facilitate easier breathing by reducing airway resistance. Therefore, their role in widening air passages is fundamental in alleviating asthma symptoms and enhancing respiratory function.