Blood do not become acidic although it carries `CO_(2)` because `:-`

Options

A. `CO_(2)` is continously diffused through tissues
B. `CO_(2)` combines with `H_(2)O` to form `HCO_(3)`
C. In `CO_(2)` transport buffers plays an important role
D. `CO_(2)` is absorbed by WBC

Answer

### Step-by-Step Solution:

1. **Understanding the Role of Carbon Dioxide**:
- Carbon dioxide (CO₂) is a non-metallic oxide that can form an acid when dissolved in water. However, blood does not become acidic despite carrying CO₂.

2. **Buffer System in Blood**:
- The primary reason blood does not become acidic is due to the presence of a buffer system. Buffers are substances that help maintain a stable pH in a solution.

3. **Red Blood Cells (RBCs)**:
- Red blood cells (RBCs) play a crucial role in transporting CO₂. They have a biconcave shape and are responsible for gas exchange.

4. **Diffusion of CO₂ into RBCs**:
- CO₂ enters the RBCs through a process called diffusion. This process allows gases to move from an area of higher concentration to an area of lower concentration.

5. **Formation of Carbonic Acid**:
- Once inside the RBCs, CO₂ combines with water (H₂O) to form carbonic acid (H₂CO₃), facilitated by the enzyme carbonic anhydrase, which is one of the fastest enzymes in the body.

6. **Dissociation of Carbonic Acid**:
- Carbonic acid can dissociate into protons (H⁺) and bicarbonate ions (HCO₃⁻). The release of protons could lower the pH, making the blood acidic.

7. **Role of Hemoglobin**:
- The free protons (H⁺) released from the dissociation of carbonic acid bind to hemoglobin. This binding prevents the pH from dropping significantly, thus maintaining a neutral pH in the blood.

8. **Bicarbonate Transport and Chloride Shift**:
- The bicarbonate ions (HCO₃⁻) are transported into the blood plasma. To maintain electrical neutrality, chloride ions (Cl⁻) move into the RBCs in a process known as the chloride shift.

9. **Conclusion**:
- Through the buffer system, the binding of protons to hemoglobin, and the chloride shift, the blood maintains a stable pH and does not become acidic despite carrying CO₂.

### Final Answer:
Blood does not become acidic although it carries CO₂ because of the buffer system present in the blood, which includes the binding of protons to hemoglobin and the transport of bicarbonate ions.

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