22. The Respiratory System
Respiration
Multiple Choice
Multiple ChoiceWhat is the approximate partial pressure of oxygen in the blood as it enters and leaves the capillaries of the alveoli?
A
Enters: 40 mm Hg, Leaves: 46 mm Hg.
B
Enters: 46 mm Hg, Leaves: 40 mm Hg.
C
Enters: 100 mm Hg, Leaves: 46 mm Hg.
D
Enters: 40 mm Hg, Leaves: 100 mm Hg.
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