Which of the following values corresponds most closely to the normal PO2 and PCO2 in the mixed venous blood returning to the lungs from the right side of the heart?
A) PO2 = 40 mm Hg; PCO2 = 46 mm Hg
B) PO2 = 40 mm Hg; PCO2 = 100 mm Hg
C) PO2 = 100 mm Hg; PCO2 = 40 mm Hg
D) PO2 = 100 mm Hg; PCO2 = 46 mm Hg
Correct Answer:
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