The major characteristic of asthma is:
a. Destruction of alveoli leading to a decreased gas exchange in the pulmonary vasculature
b. Increasing diameter in the bronchioles during exhalation resulting in air trapping in the alveoli
c. Accumulation of edema in the alveolar sacs resulting in decreased exchange of oxygen and carbon dioxide
d. Reversible lower airway obstruction
d
Rationale: a. This best describes COPD.
b. The bronchioles decrease in diameter during exhalation.
c. This best describes pulmonary edema.
d. Correct.
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