Which of the following best describes affinity in reference to oxygen- and hemoglobin-binding?
A. The higher the affinity, the higher the partial pressure of carbon dioxide.
B. The affinity that hemoglobin has to oxygen will never change.
C. The higher the affinity, the less likely it will be that oxygen binds to hemoglobin.
D. The higher the affinity, the more likely it is that oxygen bind to hemoglobin.
Answer: D. The higher the affinity, the more likely it is that oxygen bind to hemoglobin.
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