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A large proportion of oxygen remain unus...

A large proportion of oxygen remain unused in the human blood even after its uptake by the body tissues. This `O_(2)`

A

acts as a reserve during muscular exercise

B

raises the `PCO_(2)` of blood to `75 mm` of `Hg`

C

is enough to keeo oxyhaemoglobin saturation at `96%`

D

helps in releasing more `O_(2)` to the epithelial tissues.

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The correct Answer is:
A
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NCERT FINGERTIPS ENGLISH-BREATHING AND EXCHANGE OF GASES-Breathing And Exchange Of Gases
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  2. After taking a long deep breath we do not respire for some seconds due...

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  3. A large proportion of oxygen remain unused in the human blood even aft...

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  4. In the tissues, high concentrations of carbon dioxide

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  5. Fetal haemoglobin has X affinity for oxygen than that of mother's haem...

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  6. Statement 1 : About 70% of CO(2) that enters RBCs changes into HCO(3)^...

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  7. Match column I with column II and select the correct option from the c...

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  8. The enzyme that increases the reaction rate between CO(2) and H(2)O i...

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  9. Which of the following equations is correct ?

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

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  11. During CO(2) transport, HCO(3)^(-) diffuses from erythrocytes to plas...

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  12. Identify the correct statement with reference to transport of respirat...

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  13. Which of the following is ture for CO(2) concentration ?

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  14. In humans which of the following is not a step in respiration?

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  15. Although much CO(2) is carried in blood, yet blood does not become aci...

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  16. Haldane effect plays more important role in promoting carbon dioxide t...

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  17. During rest, the metabolic needs of the body are at their minimum. Whi...

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  18. Match column I with column II and select the correct option from the g...

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  19. Pneumotaxic center which can moderate the functions of the respiratory...

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  20. Match column I with column II an select the correct option from the co...

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