Question

The volume of anatomically dead space, air in the lungs of human beings is normally

• A. 230 mL
• B. 210 mL
• C. 190 mL
• D. 150 mL

Answer 1

The correct option is D 150 mL

• The volume of air remaining in the lungs after normal breathing is called the dead space air in the lungs.
• It is measured by approximately 150 mL in a normal person.
• It is the volume of the air passing from the nose or mouth to the level of the bronchioles.
• It is assumed that 30 percent (150 mL) of the tidal volume (500 mL) does not participate in the gas exchange.

So, the correct option is D.