What is the significance of the shape of the oxygen-hemoglobin dissociation curve?
A. Only significant changes in the partial pressure of oxygen will result in significant changes to hemoglobin saturation.
B. It doesn't matter how much the partial pressure of oxygen changes, hemoglobin will always be saturated at 98%.
C. The percent saturation of hemoglobin only decreases at the tissues and will never decrease at the lungs.
D. Hemoglobin saturation is directly proportional to the partial pressure of oxygen.
Answer: A. Only significant changes in the partial pressure of oxygen will result in significant changes to hemoglobin saturation.
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