Which Mammals Would Be Expected to Have Hemoglobin with the Lowest

Question

Which mammals would be expected to have hemoglobin with the lowest affinity for oxygen?
A)mouse
B)wolf
C)human
D)horse
E)elephant

Accepted Answer

Mice, being small mammals, have a higher metabolic rate compared to larger mammals like wolves, humans, horses, and elephants. This higher metabolic rate requires more oxygen to sustain cellular processes, so their hemoglobin has a lower affinity for oxygen to facilitate easier release of oxygen to tissues.