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, atmospheric pressure is lower than at sea level. This decreases the partial pressure of oxygen, reducing oxygen delivery to the blood and tissues. Consequently, individuals at high altitudes have lower oxygen concentrations.
Final Answer: \[\boxed{\text{The correct answer is (3), low atmospheric pressure.}}\]