From 97% and 90% saturation on the oxyhemoglobin dissociation curve, what change occurs in the PO2?
A. It falls from 100mm Hg to 60 mm Hg.
B. It falls from 75mm hg to 60 mm Hg.
C. It rises from 27mm Hg to 40 mm Hg.
D. It rises from 60 mm Hg to 100 mm Hg.
Answer: A
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