Under normal breathing conditions at sea level, the lowest concentration of carbon dioxide (PCO₂)would be observed at point _____ in the diagram of external and internal respiration. A)A B)B C)C D)D

Question

Quizplus · Accepted Answer

Point A represents the location where oxygen enters the body and carbon dioxide leaves the body (external respiration). Therefore, the concentration of carbon dioxide at this point would be the lowest.

Under Normal Breathing Conditions at Sea Level, the Lowest Concentration