Question

If you measure the air a person has inhaled and exhaled, you will find that the concentrations have ______ in the exhaled air.

a. Decreased
b. Increased
c. Remained the same
d. Fluctuated

Answer 1

The concentrations of air inhaled and exhaled by a person generally remain the same.

Step-by-step explanation:

The concentrations of air inhaled and exhaled by a person will generally remain the same.

When we inhale, we take in oxygen-rich air, and when we exhale, we release carbon dioxide-rich air. While the specific amounts of gases may vary slightly, the overall concentrations do not change significantly during normal breathing.

Therefore, the correct answer is c. Remained the same.