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Question: Answered & Verified by Expert
Although much CO2 is carried in blood, bloods does not become acidic because
BiologyBreathing and Exchange of GasesNEET
Options:
  • A It is absorbed by the leucocytes
  • B Blood buffers play an important role in CO2 transport.
  • C It combines with water to from carbonic acid which is neutralized by NaCO3
  • D It is continuously diffused through tissues and is not allowed to accumulate
Solution:
1953 Upvotes Verified Answer
The correct answer is: Blood buffers play an important role in CO2 transport.
CO2 enters RBC and reacts with water to form carbonic acid. Carbonic acid dissociates to form bicarbonate and hydrogen ions. Some bicarbonate ions are transported in erythrocytes, while some diffuse into the blood plasma. Exit of bicarbonate ions changes the ionic balance between the plasma and erythrocytes. To restore this balance, chloride ions diffuse from plasma into erythrocytes. Due to this, the pH of blood is maintained.

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