A-LevelBiologyTransport in mammals9700/12 · May/June 2017 · Q281 Mark

When they remain at high altitudes the red blood cell count of humans increases. Why does this occur? 1 to increase the Bohr effect 2 to increase the diffusion gradient for oxygen in the lungs 3 to maintain transport of oxygen

A1, 2 and 3

B1 and 2 only

C2 and 3 only

D3 only

✓ Correct answer

D: 3 only

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Topic: Transport in mammals, A-Level Biology (syllabus 9700). Multiple choice, 1 mark.
Source: A-Level Biology, May/June 2017 Paper 1 Variant 2, question 28.

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