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

At higher altitudes, the partial pressure of oxygen decreases, which reduces the amount of oxygen available to the body. This leads to hypoxia, a condition characterized by insufficient oxygen in the blood, causing symptoms such as fatigue, dizziness, and confusion, often referred to as anoxia. Final Answer: \[ \boxed{\text{At high altitudes, the partial pressure of oxygen is lower than at sea level.}} \]