A 22-year-old female presents with chronic bronchitis. Tests reveal closure of the airway during expiration. This condition is most likely caused by:
A) thick mucus from hypertrophied glands.
B) ventilation-perfusion mismatch.
C) hyperventilation.
D) thinning smooth muscle in the bronchioles.

Question

Quizplus · Accepted Answer

Chronic bronchitis is characterized by inflammation and narrowing of the airways due to excessive mucus production from hypertrophied glands. Closure of airway during expiration can result from the inability to effectively expel thick mucus, leading to air trapping and hyperinflation of the lungs.

A 22-Year-Old Female Presents with Chronic Bronchitis