Question

Give the reason for low concentration of oxygen in the blood and tissues of people living at high altitude.

• A. Both low temperature and high atmospheric pressure
• B. Low temperature
• C. Low atmospheric pressure
• D. High atmospheric pressure

Hint:

People living at higher altitudes may adapt by producing more red blood cells to improve oxygen absorption.

Answer 1

The Correct Option is C

At high altitudes, the atmospheric pressure is significantly lower compared to sea level. This leads to a reduction in the partial pressure of oxygen in the atmosphere, which in turn reduces the amount of oxygen available to the blood and tissues. This is the primary reason for the lower oxygen concentration in people living at high altitudes.
Final Answer: \[ \boxed{\text{The correct answer is (3), low atmospheric pressure.}} \]