Which of the following statements is true of lung capacity in middle age?
A) There is significant change in lung capacity through most of middle adulthood.
B) In late middle age, the proteins in lung tissue become more elastic.
C) Stiffening of the chest wall decreases the lungs' capacity to shuttle oxygen.
D) The lung capacity of smokers increases drastically in middle age.

Question

Quizplus · Accepted Answer

As people age, the chest wall becomes more rigid, making it harder for the lungs to expand and contract. This can lead to a decrease in lung capacity and difficulty in getting enough oxygen. Option A is false; there is slight reduction in lung capacity after the age of 30. Option B is false; in late middle age, proteins in lung tissue become less elastic. Option D is false; smoking decreases lung capacity and can cause respiratory problems.

Which of the Following Statements Is True of Lung Capacity