Altitude sickness is caused at high altitude due to

Question

Altitude sickness is caused at high altitude due to

1. A. High partial pressure of oxygen
2. B. Low partial pressure of oxygen (Correct answer)
3. C. Low level of haemoglobin
4. D. High partial pressure of carbon dioxide

Correct Answer

Option B — Low partial pressure of oxygen

Detailed Solution & Explanation

The correct answer is Low partial pressure of oxygen.

Key Points

• Altitude sickness occurs at high altitudes because the partial pressure of oxygen decreases as altitude increases, even though the percentage of oxygen remains constant (~21%).
• This makes it harder for the body to absorb sufficient oxygen.
• Symptoms include headache, nausea, and fatigue.
• Acclimatization or supplemental oxygen is the remedy.