Emphysema is best described as which of the following pathological changes?

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Multiple Choice

Emphysema is best described as which of the following pathological changes?

Emphysema is defined by enlargement of airspaces distal to the terminal bronchioles with destruction of the walls that separate those spaces. This means the alveolar septa are damaged, elastic tissue is lost, and the surface area for gas exchange decreases. The result is irreversible airspace enlargement, reduced elastic recoil, and air trapping during expiration. This distinguishes it from conditions like chronic bronchitis, which mainly features mucus hypersecretion and bronchial wall thickening, and from fibrotic diseases, where stiffening from scarring dominates.

Emphysema is defined by enlargement of airspaces distal to the terminal bronchioles with destruction of the walls that separate those spaces. This means the alveolar septa are damaged, elastic tissue is lost, and the surface area for gas exchange decreases. The result is irreversible airspace enlargement, reduced elastic recoil, and air trapping during expiration. This distinguishes it from conditions like chronic bronchitis, which mainly features mucus hypersecretion and bronchial wall thickening, and from fibrotic diseases, where stiffening from scarring dominates.

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