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A large proportion of oxygen is left unu...

A large proportion of oxygen is left unused the human blood even after its uptake by the body tissue. This `O_(2)`

A

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

B

Is enough to keep oxyhaemoglobin

C

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

D

acts as a reserve during muscular exercises

Text Solution

Verified by Experts

The correct Answer is:
D
Our tissues are able to tuilise only 25% of ` O_(2)` carried by arterial blood. The venous blood is still 75% saturated with ` O_(2)`. This ` O_(2)` acts as a reserve during muscular exercise.
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ARIHANT NEET-BREATHING AND EXCHANGE OF GASES -Chapter exercise C (Medical entrances gallery )
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  3. A large proportion of oxygen is left unused the human blood even after...

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  4. The figure given below shows a small part of human lung where exchange...

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  5. The factor which does not affect the rate of alveolar diffusion is

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  6. Haemoglobin of the human blood forms a stable complex compound with wi...

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  7. If a large number of people are enclosed in a room then

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  8. The expiratory reserve volume will be

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  9. Assertion CO(2) transport occurs very fast through RBCs. Reason : E...

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  10. Hiccups can be best described as

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  11. Dead space air in man is

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  12. Amount of CO(2) in expired air is about

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  13. Which two of the following changes (A-B) usually tend to occur in the ...

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  14. The volume of air, inspired or expired during normal respiration is ca...

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  15. Between breaths, the intrapleural pressure is approximately ……. Mm Hg ...

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  16. Which of the following is a respiratory disease ?

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  17. How many molecules of oxygen are bound to one molecule of haemoglobin?

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  18. After deep inspiration, capacity of maximum expiration of lung is call...

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  19. Oxy-haemoglobin dissociates into oxygen and deoxy-haemoglobin at

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