Which of the following statements is true about the effects of aging on the pulmonary system?
1)Alveolar septa gradually deteriorate.
2)The number of alveoli gradually decreases.
3)Loss of alveolar walls reduces the surface area for gas exchange.
4)Smooth muscle fibers in the lungs are progressively replaced with fibrous connective tissue.

Question

Quizplus · Accepted Answer

A number of age-related physiologic changes are seen in the pulmonary system. Smooth muscle fibers in the lungs are progressively replaced with fibrous connective tissue. Alveolar septa deteriorate gradually. Although the number of alveoli does not change, loss of alveolar walls increases the size of the alveoli and reduces surface area for gas exchange.

Which of the Following Statements Is True About the Effects