COPD leads to a barrel chest,because it causes
A) pulmonary edema.
B) muscle atrophy.
C) prolonged inspiration.
D) air trapping.

Question

Quizplus · Accepted Answer

Destruction of alveolar walls reduces lung elastic recoil,which allows airway collapse during exhalation.Air enters the alveoli during inhalation,but has difficulty escaping during exhalation.When air is trapped in the alveoli,residual volume increases,causing a barrel chest.Destruction of alveolar walls does not cause pulmonary edema,muscle atrophy,or prolonged inspiration.

COPD Leads to a Barrel Chest,because It Causes