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People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million.This is because at high altitude :
  • a)
    People eat more nutritive food, therefore more RBCs are formed
  • b)
    People get pollution free air to breathe and more oxygen is available
  • c)
    Atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survive
  • d)
    There is more UV radiation which enhances RBC production.
Correct answer is option 'C'. Can you explain this answer?
Most Upvoted Answer
People living at sea level have around 5 million RBC per cubic millime...
At high altitude the pO2 is less and thus it's not easily absorbed by hb of red blood cells. so in order to compensate that, our body increases the no. of RBCs so that the required amount of O2 can be taken by blood and even breathing rate becomes quicker .so,op C is correct.
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Community Answer
People living at sea level have around 5 million RBC per cubic millime...
Atmospheric O2 level is less at high altitudes
- At high altitudes, the concentration of oxygen in the atmosphere decreases significantly.
- This means that individuals living at high altitudes are exposed to lower levels of oxygen when compared to those living at sea level.

More RBCs are needed to absorb the required amount of O2
- Red blood cells (RBCs) are responsible for carrying oxygen from the lungs to the rest of the body.
- With lower levels of oxygen available at high altitudes, the body compensates by producing more RBCs to ensure an adequate supply of oxygen to tissues and organs.
- This increase in RBC production helps individuals living at high altitudes adapt to the lower oxygen levels and thrive in such environments.
Therefore, the correct answer is option 'C': Atmospheric O2 level is less at high altitudes and hence more RBCs are needed to absorb the required amount of O2 to survive.
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People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million.This is because at high altitude :a)People eat more nutritive food, therefore more RBCs are formedb)People get pollution free air to breathe and more oxygen is availablec)Atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survived)There is more UV radiation which enhances RBC production.Correct answer is option 'C'. Can you explain this answer?
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People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million.This is because at high altitude :a)People eat more nutritive food, therefore more RBCs are formedb)People get pollution free air to breathe and more oxygen is availablec)Atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survived)There is more UV radiation which enhances RBC production.Correct answer is option 'C'. Can you explain this answer? for NEET 2024 is part of NEET preparation. The Question and answers have been prepared according to the NEET exam syllabus. Information about People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million.This is because at high altitude :a)People eat more nutritive food, therefore more RBCs are formedb)People get pollution free air to breathe and more oxygen is availablec)Atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survived)There is more UV radiation which enhances RBC production.Correct answer is option 'C'. Can you explain this answer? covers all topics & solutions for NEET 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for People living at sea level have around 5 million RBC per cubic millimeter of their blood whereas those living at an altitude to 5400 metres have around 8 million.This is because at high altitude :a)People eat more nutritive food, therefore more RBCs are formedb)People get pollution free air to breathe and more oxygen is availablec)Atmospheric O2 level is less and hence more RBCs are needed to absorb the required amount of O2 to survived)There is more UV radiation which enhances RBC production.Correct answer is option 'C'. Can you explain this answer?.
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