What is aim of Chloride - bicarbonate shift ?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Chloride-Bicarbonate Shift**: The chloride-bicarbonate shift refers to the process where bicarbonate ions (HCO3-) and chloride ions (Cl-) exchange across the membrane of red blood cells (RBCs).

2. **Mechanism of Ion Exchange**: In this process, when carbon dioxide (CO2) enters the red blood cells from the tissues, it reacts with water to form carbonic acid (H2CO3), which then dissociates into bicarbonate ions and hydrogen ions (H+). The bicarbonate ions are transported out of the red blood cells into the plasma.

3. **Chloride Ion Movement**: As bicarbonate ions leave the red blood cells, chloride ions move into the cells to maintain electrical neutrality. This exchange is crucial for the proper functioning of red blood cells and the transport of gases.

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