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A large proportion of oxygen remains unu...

A large proportion of oxygen remains 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 keep 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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There is a pair of bean-shaped organs 'P' in the human body towards the back, just above the waist. A waste product 'Q formed by the decomposition of unused proteins in liver is brought into organ 'P' through blood by an artery "R". The numerous tiny filters 'S' present in organ 'P' clean the dirty blood goes into circulation through a vein ‘T'. The waste substance 'Q' and other waste salts and excess water form a yellowish liquid 'U' which goes from organ 'P' into a bag like structure 'V' through two tubes 'W'. This liquid is then thrown out of the body through a tube 'X'. What is (i) organ P and (ii) waste substance Q.

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AAKASH SERIES-BREATHING AND EXCHANGE OF GASES -EXERCISE-III (Previous AIPMT/NEET Questions)
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  2. Which of the following cannot be measured by spirometry?

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  3. A pollution can result in Emphysema, which is

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  4. Name the chronic respiratory disorder caused mainly by cigarette smoki...

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  5. Reduction in blood pH will

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  6. The partial pressure of oxygen in the alveoli of the lungs is

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  7. Lungs do not collapse between breaths and w some air always remains in...

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  8. Name the pulmonary disease in which alveolar surface area involved in ...

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  9. When you hold your breath, which of the following gas changes in blood...

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  10. Approximately seventy percent of carbon dioxide absorbed by the blood ...

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  11. Which one of the following is the correct statement for respiration in...

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  12. Why people migrate from place to place? Is there any families migrate ...

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  13. A large proportion of oxygen remains unused in the human blood even af...

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  14. Bulk of carbon dioxide (CO2) released from body tissues into the blood...

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  15. Which one of the following a possibility for most of us in regard to b...

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  16. What is true about RBCs in humans?

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  17. What is vital capacity of our lungs?

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  18. The haemoglobin of a human foetus

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