Which of the following statements about lung capacity in middle-age is true?

Question

Quizplus · Accepted Answer

Stiffening of the chest wall, which is a natural part of aging, decreases the lungs' capacity to shuttle oxygen. This can lead to shortness of breath, especially during physical activity. The other choices are false: there is some decrease in lung capacity, but it is not significant until later in adulthood; the proteins in lung tissue become less elastic with age; and smoking actually decreases lung capacity over time.

Which of the Following Statements About Lung Capacity in Middle-Age