Ventilation primarily involves which process?

Ventilation primarily involves which process?

• A. Removal of CO2
• B. Oxygen transport
• C. Gas exchange
• D. Pulmonary perfusion

Answer: (A)

Ventilation is the mechanical movement of air into and out of the lungs, and its primary role is to remove carbon dioxide produced by metabolism. By exhaling, the body gets rid of CO2 and helps maintain the proper alveolar and arterial CO2 levels, which in turn helps regulate pH. Oxygen in inhaled air is prepared for diffusion into the blood, but the actual transport of oxygen to tissues is handled by the circulatory system after diffusion has occurred. Gas exchange refers to the diffusion of O2 and CO2 across the alveolar-capillary membrane, a process that depends on ventilation to supply fresh air and remove CO2, but ventilation itself is centered on elimination of CO2. Pulmonary perfusion is about blood flow through the lungs to enable that gas exchange. So the primary function of ventilation is the removal of CO2.

Ventilation is the mechanical movement of air into and out of the lungs, and its primary role is to remove carbon dioxide produced by metabolism. By exhaling, the body gets rid of CO2 and helps maintain the proper alveolar and arterial CO2 levels, which in turn helps regulate pH. Oxygen in inhaled air is prepared for diffusion into the blood, but the actual transport of oxygen to tissues is handled by the circulatory system after diffusion has occurred. Gas exchange refers to the diffusion of O2 and CO2 across the alveolar-capillary membrane, a process that depends on ventilation to supply fresh air and remove CO2, but ventilation itself is centered on elimination of CO2. Pulmonary perfusion is about blood flow through the lungs to enable that gas exchange. So the primary function of ventilation is the removal of CO2.