In the systemic arteries, the partial pressure of oxygen is approximately ________, and hemoglobin is approximately ________ saturated with oxygen.
A) 40 mm Hg : 75%
B) 100 mm Hg : 75%
C) 60 mm Hg : 50%
D) 40 mm Hg : 50%
E) 100 mm Hg : 98%
Answer: B) 100 mm Hg : 75%
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