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People living at sea level have around 5 million RBCs per cubic millimetre 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 oxygen level is less and, hence more RBCs are needed to absorb the required amount of oxygen to survive

c)

There is more UV radiation, which enhances RBCs production

d)

People eat more nutritive food, therefore, more RBCs are formed



Question ID - 3544 | SaraNextGen Top Answer

People living at sea level have around 5 million RBCs per cubic millimetre 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 oxygen level is less and, hence more RBCs are needed to absorb the required amount of oxygen to survive

c)

There is more UV radiation, which enhances RBCs production

d)

People eat more nutritive food, therefore, more RBCs are formed

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

At high altitudes, the atmospheric oxygen level is less and hence, more RBCs are needed to absorb the required amount of oxygen to survive. That is why, the people living at sea level have around 5 million RBCs/  of their blood, whereas those living at an altitude of 5400 m have around 8 million RBCs/  of their blood.

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