In emphysema,all of the following occur except A)alveoli collapse. B)compliance increases. C)there is elevated PCO₂ in the blood. D)the surface area for gas exchange decreases. E)patients present with cyanosis.

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In emphysema, patients typically do not present with cyanosis initially because they are often able to maintain adequate oxygenation despite the destruction of alveoli. Cyanosis is more commonly associated with chronic bronchitis, another form of COPD.

In Emphysema,all of the Following Occur Except