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A pair of external nostrils present in h...

A pair of external nostrils present in humans opens
out

A

Below the upper lips

B

Above the upper lips

C

Between upper and lower lips

D

Above the larynx

Text Solution

Verified by Experts

The correct Answer is:
B
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AAKASH INSTITUTE ENGLISH-BREATHING AND EXCHANGE OF GASES -ASSIGNMENT SECTION - B
  1. Which group of animals respire through lungs?

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  2. A pair of external nostrils present in humans opens out

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  3. Solubility of CO(2) is times higher than that of O(2)

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  4. What are the characteristics of alveoli?

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  5. What is the function of respiratory part of human respiratory system...

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  6. Thoracic cage of man is formed of

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  7. During inspiration, the volume of thoracic caity increases because o...

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  8. Volume of thoracic chamber increases in antero- prosterior and dorse-...

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  9. What instrument helps in clinical assessment of pulmonary functions?

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  10. Expiration occurs due to

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  11. What happens to the volume of pulmonary cavity when there is an incr...

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  12. Diaphragm is a dome-shaped muscular structure which separates

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  13. Following processes will occur if pressure within the pulmonary cavit...

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  14. An additional volume of air, a person can inspire by a forceful insp...

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  15. Volume of air which cannot be measured by spirometer

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  16. What is the value of pO(2) in alveoli and tissues respectively?

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  17. How many layers form the diffusion membrane ?

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  18. What is the percentage of O(2) transported in dissolved form through...

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  19. How many molecules of O2 can associate with a molecule of haemoglobin ...

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  20. To which part of Hb, CO(2) binds?

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