Question

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

• A. At high altitudes the partial pressure of oxygen is less than at the ground level.
• B. At high altitudes the partial pressure of oxygen is more than at the ground level.
• C. At high altitudes the partial pressure of oxygen is equal to that at the ground level.
• D. None of these

Hint:

Reduced oxygen availability at high altitudes can cause altitude sickness or anoxia, which can impair cognitive and physical functions.

Answer 1

The Correct Option is A

The reduced partial pressure of oxygen at higher altitudes limits the oxygen supplied to the body. This results in hypoxia, a state of inadequate blood oxygenation, manifesting as fatigue, dizziness, and confusion. This condition is sometimes called anoxia. Final Answer: \[ \boxed{\text{At high altitudes, the partial pressure of oxygen is lower than at sea level.}} \]