Question

Which of the following is the long-term effect of exercise on the respiratory system?

Options

• Residual volume increases

• Respiratory rate increases

• Stroke volume increases

• The rate of exchange of gas increases

Answer 1

The rate of exchange of gas increases

Explanation:

This is a long-term adaptation. Regular exercise leads to an increase in the number of functioning alveoli and a denser network of capillaries around them. This structural change, known as increased pulmonary diffusion, allows oxygen and carbon dioxide to be exchanged more efficiently between the lungs and the blood.