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Explain the following : (a) We can hold ...

Explain the following : (a) We can hold our breath for about 40-50 sec only.

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(a) We can hold our breath for 40-50 sec only because by this time too much `CO_(2)` accumulates in blood and stimulates respiratory centre.
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SANTRA PUBLICATION-BREATHING AND RESPIRATION-Short Answer Type Questions
  1. (a) What is surfactant?

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  2. (b) What is the air pressure within the lungs of man?

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  3. Explain the following : (a) We can hold our breath for about 40-50 sec...

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  4. Explain the following :(b) At higher altitude (i) Respiration is hurri...

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  5. (a) What is dead space air? What is its value in normal adult male ?

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  6. (b) Name the respiratory centres and mention their location in brain s...

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  7. (a) How does CO(2) enter the lungs from blood?

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  8. (b) How does O(2) enter the blood from lungs? (c) Name the membrane c...

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  9. (a) What is ventilation perfusion ratio?

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  10. (b) What is the effect of raised CO(2) concentration in arterial blood...

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  11. (a) Why the chloride concentration of RBC in venous blood is more than...

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  12. State the factors controlling respiration.

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  13. From where the rhythm of respiration is generated in the human body?

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  14. Explain why trachea does not collapse ?

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  15. Mention the amount of CO(2) in (a) 100 ml venous blood and (b) 100 ml...

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  16. Between O(2) and CO(2) which one is present more in arterial blood ?

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  17. Why is the amount of CO(2) less in expired air than that in alveolar a...

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  18. In which form is CO(2) carried in venous blood ?

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  19. (a) What is Apnoea ? (b) What are its causes? (c) What is Cheyne-stok...

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  20. (a) What is Mountain sickness? (b) What are its symptoms ?

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