Breathing And Exchange Of Gases Animal Respiration Question 22
Question: Although much $ CO_2 $ is carried in blood, yet blood does not become acidic, because:
Options:
A) It is absorbed by the leucoc
B) Blood buffers play an important role in $ CO_2 $ transport.
C) It combines with water to form $ H_2CO_3 $ which is neutralised by $ NaCO_3 $ .
D) it is continuously diffused through tissues and is not allowed to accumulate.
Show Answer
Answer:
Correct Answer: B
Solution:
[b] $ CO_2 $ 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 change 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.
BETA
