A-LevelBiologyTransport in mammals9700/12 · May/June 2016 · Q291 Mark
The graph shows changes in percentage saturation of haemoglobin with oxygen in the blood of a human and of another animal. The partial pressure of carbon dioxide remains constant at 1.0kPa and the temperature is constant at 25°C. [Figure 29.1] Which conclusion is supported by the graph?
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AAt 25 °C the affinity of haemoglobin for oxygen increases more in humans than in the animal.
BHaemoglobin in the animal carries less oxygen than haemoglobin in the human.
COxygen is more easily released from haemoglobin in animal muscle than in human muscle.
DThe Bohr effect in the haemoglobin of the animal is greater than in human haemoglobin.
✓ Correct answer
C: Oxygen is more easily released from haemoglobin in animal muscle than in human muscle.
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