AIPMT PRELIMS2006Zoology-Human Physiology
AIPMT PRELIMS 2006 Zoology Respiratory System MCQ Question
Type: MCQ-conceptual-Medium-Class 11
People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude of 5400 metres have around 8 million. This is because at high altitude:
A
people get pollution-free air to breathe and more oxygen is available
B
atmospheric O₂ level is less and hence more RBCs are needed to absorb the required amount of O₂ to survive
C
there is more UV radiation which enhances RBC production
D
people eat more nutritive food, therefore more RBCs are formed
Correct Answer
Option B
Detailed Explanation
At high altitudes, the atmospheric oxygen level is lower, requiring the body to produce more RBCs to maintain adequate oxygen transport.
Found an issue with this question?