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People living at sea level have around 5...

People living at sea level have around `5` million RBC 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

pepole get pollution free air to breath and more oxygen is available

B

atmospheric ` O_(2)` level is less and hence, more RBCs are needed to absord the required amount of ` O_(2)` to survive

C

There is more UV radiation, which enhances RBC production.

D

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

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The correct Answer is:
B
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ARIHANT NEET-BREATHING AND EXCHANGE OF GASES -Chapter exercises A (Taking it together ( assorted Questions of the Chapter of Advanced Level Practice))
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  8. Identify the correct statement with reference to transport of respirat...

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  9. People living at sea level have around 5 million RBC per cubic millime...

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  10. Air moves into the lungs when atmospheric pressure is

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  11. Artificial respiration at the rate of 10-15 times per minute is being ...

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  12. I. The pO(2) in alveolar air is about ….A…. Mm Hg and in arterial capi...

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  13. Read the following statemens with regard to oxyhaemoglobin dissociatio...

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  14. Identify the correctly matched option from below :

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  18. granular peumocytes secrete dipalmitoyl phosphatidyl choline, these ar...

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  19. Primary inspiratory muscles are/is

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  20. Given below are some factors which may affect the oxyhaemoglobin disso...

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