Airway obstruction contributing to increased airflow resistance and hypoventilation in asthma is caused by:
A) type II alveolar cell injury and decreased surfactant.
B) alveolar fibrosis and pulmonary edema.
C) mucus secretion, bronchoconstriction, and airway edema.
D) collapse of the cartilaginous rings in the bronchi.

Question

Quizplus · Accepted Answer

Mucus secretion, bronchoconstriction, and airway edema are all common causes of airway obstruction in asthma. These factors contribute to increased airflow resistance and decreased ventilation, leading to hypoventilation. Type II alveolar cell injury and decreased surfactant can contribute to respiratory distress syndrome, but are not typically associated with asthma. Alveolar fibrosis and pulmonary edema may be seen in some cases of chronic obstructive pulmonary disease, but are not typically seen in asthma. Collapse of the cartilaginous rings in the bronchi may occur in tracheomalacia, but is not typically seen in asthma.

Airway Obstruction Contributing to Increased Airflow Resistance and Hypoventilation in Asthma