Question

People living at sea level have around 5 millions
RBC per cubic millimeter of their blood whereas
those living at an altitude of 5400 metres have
around 8 millions. This is because at high altitude
(a) atmospheric O₂ level is less and hence more
RBCs are needed to absorb the required
amount of O₂ to survive
(b) there is more UV radiation which enhances
RBC production
(c) people eat more nutritive food, therefore more
RBCs are formed
(d) people get pollution - free air to breathe and
more oxygen is available

Answer 1

Answer:

atmospheric o2 level is less and hence rbc are needed to absorb the required amount to 02 to survive

Answer 2

People living at an altitude of 5400 meters have a higher RBC count than people living at sea level because at high altitude

(a) atmospheric O₂ level is less and hence more  RBCs are needed to absorb the required  amount of O₂ to survive

Explanation:

The atmosphere gets less and less dense as altitude increases, due to which the amount of oxygen also decreases.

Therefore people living at high altitudes have bodies that have adapted to these conditions by producing more RBCs per cubic millimeter to absorb the required amounts of oxygen from the thinning atmosphere.