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When you hold your breath, which of the ...

When you hold your breath, which of the following gas changes in blood would first lead to the urge to breathe

A

rising `CO_(2)` concentration

B

falling `CO_(2)` concentration

C

rising `CO_(2)` and falling `O_(2)` concentration

D

falling `O_(2)` concentration

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The correct Answer is:
A
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MOTION-BREATHING AND EXCHANGE OF GASES-Exercise 3
  1. Which two of the following changes (A-B) usually tend to occur in the ...

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  2. What is true about RBCs in humans?

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  3. Which one of the following is a possibility for most of us in regards ...

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  4. Two friends are eating togeather on a dinning table. One of them sudde...

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

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  6. A large proportion of oxygen is left unused the human blood even after...

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  7. Bulk of carbon dioxide (CO(2)) released from body tissues into the blo...

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

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  9. People who have migrated from the planes to an area adjoining Rohtang ...

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  10. During swallowing of food which of the following structures prevent th...

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  11. the figure shows a diagrammatic view of human respiratory system with ...

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  12. The major fraction of CO(2) released during cellular respiration is tr...

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  13. Name the pulmonary disease in which alveolar surface area involv...

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

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  15. Asthma may be attributed to:

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

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  17. Lungs do not collapse between breaths and some air always remains in t...

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  18. Which statement is wrong for Krebs' cycle ?

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  19. Due to increasing air-borne allergens a pollutants, many people in urb...

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  20. Tidal Volume and Expiratory Reserve Volume an athlete is 500 mL and 10...

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