Emphysema is associated with which description?

• A. Destruction of elastin leading to narrowed, collapsed airways and permanent holes.
• B. Chronic mucus secretion with productive cough.
• C. Increased surface area of alveoli with improved gas exchange.
• D. Pleural effusion.

Answer: (A)

Emphysema arises from damage to elastin and other alveolar wall components, typically from a protease–antiprotease imbalance. This destruction weakens the walls, causing loss of elastic recoil and collapse of small airways during expiration, while alveolar walls break down to create enlarged air spaces (bullae). The net result is reduced surface area for gas exchange and air trapping with hyperinflation. The description that emphasizes elastin destruction along with narrowed, collapsed airways and permanent holes in the lung tissue fits this pattern best.

Chronic mucus buildup with a productive cough points to chronic bronchitis, not emphysema. An increased surface area would improve gas exchange, which isn’t the case in emphysema. Pleural effusion is fluid in the pleural space and isn’t a defining feature of emphysema.