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Breathing and Exchange of Gases

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Difficult Questions

Advanced Zoology

Animal Kingdom
Structural Organisation in Animals
Digestion and Absorption
Breathing and Exchange of Gases
Body Fluids and Circulation
Excretory Products and their Elimination
Locomotion and Movement
Neural Control and Coordination
Chemical Coordination and Integration
Human Reproduction
Human Health and Disease
Biotechnology Principles and Processes
Biomolecules (Zoology)
Evolution (Zoology)
Biotechnology and its Applications
Reproductive Health
  1. Bulk of carbon dioxide (CO2) released from body tissues into the blood is present as
    1. bicarbonate in blood plasma and RBCs
    2. free CO2 in blood plasma
    3. 70% carbamino- haemoglobin and 30% as bicarbonate
    4. carbamino-haemoglobin in RBCs
Correct Option: A

70% to 75% CO2 is transported as primary buffer of the blood bicarbonate ion (HCO3) in blood plasma. When CO2 diffuses from tissues into blood then it is acted upon by the enzyme carbonic anhydrase.


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