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CO2 Transport in Blood – 20 MCQ Quiz
NEET-PG / Medical Physiology Quiz

Topic: Transport of CO2 from tissues to lungs
Total Questions: 20
Each question carries 1 mark.
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1. Approximately what percentage of CO2 is transported in blood as carbamino compounds, mainly carbaminohemoglobin? *
2. CO2 binds to which portion of hemoglobin to form carbaminohemoglobin? *
3. Deoxygenated hemoglobin can carry more CO2 than oxygenated hemoglobin. This phenomenon is called: *
4. What happens to carbaminohemoglobin when hemoglobin becomes oxygenated in the lungs? *
5. Approximately what percentage of CO2 is transported in blood mainly as bicarbonate (HCO3−)? *
6. The enzyme that rapidly catalyzes the reaction between CO2 and water is: *
7. Carbonic anhydrase catalyzes the formation of which intermediate from CO2 and water? *
8. Carbonic acid in red blood cells dissociates primarily into: *
9. The H+ generated during CO2 transport in red blood cells is mainly buffered by: *
10. During bicarbonate formation in systemic capillaries, HCO3− leaves the RBC while which ion enters the RBC? *
11. The exchange of bicarbonate leaving the RBC for chloride entering the RBC is called: *
12. Another name for the chloride shift is: *
13. Where does the chloride shift occur prominently during systemic CO2 transport? *
14. In the lungs, oxygenation of hemoglobin facilitates the release of: *
15. In the pulmonary capillaries, bicarbonate re-enters the RBC and is converted ultimately into: *
16. Approximately what percentage of total CO2 is transported simply dissolved in plasma? *
17. Which combination represents the three major forms of CO2 transport in blood? *
18. The ability of deoxygenated hemoglobin to bind CO2 and H+ more effectively helps explain which effect? *
19. In respiratory failure with CO2 retention, the primary abnormality is: *
20. Which respiratory pattern may occur in severe respiratory failure with progressive CO2 retention and hypoxia? *
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