Human Cannot Survive Long at Altitudes Greater Than 6000m Because

question 29

Multiple Choice

Human cannot survive long at altitudes greater than 6000m because _________.

• A)alveoli become too small at the lower atmospheric pressures
• B)the diffusion of O₂ becomes too low at that atmospheric pressure
• C)the partial pressure of O₂ becomes less than half that at sea level
• D)the diaphragm cannot be contracted enough to produce a full breath

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