A) RBCs to plasma
B) plasma to RBCs
C) lungs to blood
D) blood to lungs.
Correct Answer: B
Solution :
: During the internal respiration, the carbon dioxide in gaseous form diffuses out of the cells into the capillaries. The largest fraction of \[C{{O}_{2}}\] is converted to bicarbonate ions \[(HC{{O}^{-}}_{3})\] in the RBCs. The bicarbonate ions are quite diffusible, therefore, they diffuse from RBCs into the plasma. To maintain ionic balance chloride \[(C{{l}^{-}})\] ions move from the plasma into the RBCs. This ionic exchange is called chloride shift.
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