Which of the following statements is true about the aging respiratory system?
A) By the age of 70 years, vital capacity has decreased about 33%.
B) Aging is an increase in the total number of alveoli.
C) By the age of 70 years, all the alveoli have collapsed.
D) Because of the decrease in vital capacity, a person older than 70 years should not exercise.

Question

Quizplus · Accepted Answer

As a person ages, lung capacity decreases. The decrease in lung capacity is caused by the loss of elasticity of the lung tissue and diminished efficiency of the respiratory muscles. By the age of 70 years, vital capacity has decreased 33%.

Which of the Following Statements Is True About the Aging