Which normal physiologic change occurs in the aging pulmonary system?
A)Decreased flow resistance
B)Fewer alveoli
C)Stiffening of the chest wall
D)Improved elastic recoil

Question

Quizplus · Accepted Answer

Aging decreases chest wall compliance and elastic recoil of the lungs. There is loss of alveolar wall tissue and alveolar enlargement, thus diminishing surface area available for gas diffusion with aging. Aging can also cause the PaO₂ to decrease. Vital capacity decreases and residual volume increases; however, total lung capacity remains unchanged.

Which Normal Physiologic Change Occurs in the Aging Pulmonary System