The Physical Movement of Air into and Out of Lungs

Question

The physical movement of air into and out of lungs is termed
A) external respiration.
B) internal respiration.
C) cellular respiration.
D) pulmonary ventilation.
E) gas diffusion.

Accepted Answer

The physical movement of air into and out of lungs is called pulmonary ventilation. Option A is incorrect as external respiration refers to the exchange of gases between the atmosphere and the body tissues. Option B is incorrect as internal respiration refers to the exchange of gases between the blood and body tissues. Option C is incorrect as cellular respiration is the metabolic process by which cells use oxygen to produce energy. Option E is incorrect as gas diffusion refers to the movement of gases from high concentration to low concentration.