Which Activity Below is NOT a Respiratory Event

Question

Which activity below is NOT a respiratory event
A)Carbon dioxide is exchanged in the alveoli.
B)Gas exchange occurs between tissues and the blood.
C)Cells produce nitrogen by their metabolism.
D)Oxygen is exchanged in the alveoli.

Accepted Answer

The production of nitrogen by cell metabolism is not a respiratory event. Respiration is primarily concerned with the exchange of gases, particularly oxygen and carbon dioxide, between the atmosphere and the body's cells. While nitrogen is present in the air we breathe, it does not play a direct role in respiration.