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

Options

A. `CO_(2)` is continuously 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 (CO₂) in Blood:**
- Blood carries carbon dioxide as a waste product from the tissues to the lungs for exhalation. However, the presence of CO₂ does not make the blood acidic.

2. **Buffering Action of Blood:**
- The blood has a buffering system that helps maintain its pH level. This buffering action prevents the blood from becoming acidic despite the presence of CO₂.

3. **Main Buffer in Blood:**
- The primary buffer in the blood is bicarbonate (HCO₃⁻). This compound plays a crucial role in maintaining the pH balance.

4. **Equilibrium with Carbonic Acid:**
- Bicarbonate exists in equilibrium with carbonic acid (H₂CO₃). The reaction can be represented as follows:
\[ \text{CO₂} + \text{H₂O} \leftrightarrow \text{H₂CO₃} \leftrightarrow \text{H}^+ + \text{HCO₃}^- \]
- This equilibrium allows the blood to neutralize excess acids, thus preventing it from becoming acidic.

5. **Reversible Processes:**
- The reactions involving carbon dioxide, water, carbonic acid, and bicarbonate are reversible. This means that the body can adjust the concentrations of these substances to maintain a stable pH.

6. **Conclusion:**
- Therefore, blood does not become acidic despite carrying CO₂ due to the buffering action of bicarbonate, which maintains pH homeostasis.

**Final Answer:**
Blood does not become acidic although it carries CO₂ because of the buffering action of bicarbonate, which maintains the pH balance.

---