Question

If genetically engineered human becomes able to run long distances with high speed at high altitudes, which of the following would not help?

• A. Increasing the thickness of the cellular lining of alveoli.
• B. Decreasing the average size of alveoli.
• C. Decreasing the binding affinity of oxygen and haemoglobin at very low oxygen potential pressures.
• D. Both A and B.

Answer 1

The correct option is D Both A and B.

For humans to run long distances faster at high altitudes, increasing the thickness of the cellular lining of alveoli and decreasing the average size of alveoli would not help.