Bronchitis effect on gas exchange

Bronchitis effect on gas exchange

• A. Gas exchange lowers due to mucus buildup
• B. Gas exchange increases due to mucus clearance
• C. Gas exchange unaffected
• D. Gas exchange improves due to alveolar recruitment

Answer: (C)

Bronchitis mainly inflames the airways and increases mucus production, which narrows the bronchi and makes breathing harder. Gas exchange happens in the alveoli, where oxygen diffuses into blood and carbon dioxide diffuses out across the alveolar-capillary membrane. In uncomplicated bronchitis, the alveolar structures and their diffusion capacity aren’t directly damaged, so the overall ability for gases to diffuse remains intact. The mucus and airway obstruction slow airflow, but they don’t inherently impair the diffusion process at the alveolar level, so gas exchange is typically unchanged. Only if there’s accompanying lung tissue involvement (like pneumonia) or significant V/Q mismatch would gas exchange be affected.

Bronchitis mainly inflames the airways and increases mucus production, which narrows the bronchi and makes breathing harder. Gas exchange happens in the alveoli, where oxygen diffuses into blood and carbon dioxide diffuses out across the alveolar-capillary membrane. In uncomplicated bronchitis, the alveolar structures and their diffusion capacity aren’t directly damaged, so the overall ability for gases to diffuse remains intact. The mucus and airway obstruction slow airflow, but they don’t inherently impair the diffusion process at the alveolar level, so gas exchange is typically unchanged. Only if there’s accompanying lung tissue involvement (like pneumonia) or significant V/Q mismatch would gas exchange be affected.