Which of the following regarding aging and the respiratory system is true?
A) The lungs' ability to deflate actually increases.
B) Respiratory volume remains unchanged after age 30.
C) Roughly one square foot of respiratory membrane is lost each year after age 30.
D) Emphysema is only present in individuals who smoke.
E) Elastic tissue in the respiratory system is not affected by age.

Question

Quizplus · Accepted Answer

One square foot of respiratory membrane is lost each year after age 30, which reduces the surface area available for gas exchange and makes it harder to breathe.

Answer: D
 Emphysema is commonly associated with smoking, but it can also be caused by other factors such as air pollution and genetics.

Therefore, the correct answer is C and D.

Which of the Following Regarding Aging and the Respiratory System