Pulmonary Ventilation Has Two Phases; They Are

Question

Pulmonary ventilation has two phases; they are
A) inspiration and expiration
B) external respiration and internal respiration
C) external respiration and cellular respiration
D) internal respiration and cellular respiration

Accepted Answer

Pulmonary ventilation, or breathing, involves two phases: inspiration, during which air is taken into the lungs, and expiration, during which air is expelled from the lungs. The other options refer to different processes within cellular respiration, which is not part of pulmonary ventilation.