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MCAT Question A Day - 8/18/14

At high altitudewater vapor pressure in the lungs remains the same and carbon dioxide pressure falls slightly. Oxygen pressure falls. The bodof a person remaining at high altitudes for days, weeks, and even years will acclimatize. All of the following changes assist the body in coping with low oxygen EXCEPT:

A increased red blood cells.
B.  decreased vascularity of thtissues.
C increased pulmonary ventilation.
D increased diffusing capacity of the lungs.

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