Saunders Respiratory Practice

Bronchodilators are a class of medications that are primarily used to relax and widen the airways in the lungs, facilitating better airflow. Their mechanism of action involves targeting the smooth muscles surrounding the bronchi and bronchioles, leading to bronchodilation. This process helps to alleviate symptoms associated with respiratory conditions like asthma and chronic obstructive pulmonary disease (COPD), where constricted airways can lead to breathing difficulties.

By opening up the air passages, bronchodilators not only improve airflow but also enable patients to breathe more comfortably and enhance the efficiency of oxygen delivery throughout the body. Effective bronchodilation can significantly improve respiratory function and quality of life for individuals with obstructive lung diseases. Thus, the central role of bronchodilators in respiratory treatments is to dilate the airways and improve airflow, making this the most appropriate answer in the context of respiratory care.