Question

People living at high altitudes often reported with a problem of feeling weak and inability to think clearly. The reason for this is:

Options

• at high altitudes, the partial pressure of oxygen is less than at ground level.

• at high altitudes, the partial pressure of oxygen is more than at ground level.

• at high altitudes, the partial pressure of oxygen is equal to that at ground level.

• None of these.

Answer 1

At high altitudes, the partial pressure of oxygen is less than at ground level.

Explanation:

At high altitudes, the partial pressure of oxygen is less than that at the ground level. This leads to low concentrations of oxygen in the blood and tissues of people living at high altitudes or climbers. Low blood oxygen causes climbers to become weak and unable to think clearly, symptoms of a condition known as anoxia.