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Q. Chloride shift occurs in response to

Punjab PMETPunjab PMET 2007Breathing and Exchange of Gases

Solution:

Bicarbonate ions which are formed inside the $RBC$ diffuse from $RBC$ into the plasma . To maintain the ionic balance $Cl^{-}$ ions move from plasma into $RBCs$. This ionic exchange is called chloride shift or Hamburger's phenomenon
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• Chloride shift is required for $CO_2$ transport .