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 in Blood:**
- Carbon dioxide (CO₂) is a byproduct of cellular respiration and is transported in the blood from tissues to the lungs for exhalation.

2. **Transport Mechanisms of Carbon Dioxide:**
- CO₂ is transported in three main forms:
- Dissolved directly in the plasma.
- Bound to hemoglobin and other proteins.
- Converted into bicarbonate ions (HCO₃⁻) through a reaction with water.

3. **Bicarbonate Formation:**
- The majority of CO₂ (about 70%) is converted into bicarbonate ions in the blood. This reaction is facilitated by the enzyme carbonic anhydrase, which catalyzes the formation of carbonic acid (H₂CO₃) from CO₂ and water (H₂O).
- The carbonic acid can dissociate into bicarbonate (HCO₃⁻) and hydrogen ions (H⁺).

4. **Buffering System:**
- The bicarbonate system acts as a buffer. When H⁺ ions are produced, they combine with bicarbonate to form carbonic acid, which can then dissociate back into CO₂ and water.
- This buffering action prevents a significant increase in acidity (lower pH) of the blood.

5. **Role of Buffers:**
- Buffers in the blood, such as bicarbonate, play a crucial role in maintaining pH levels. They resist changes in pH by neutralizing excess acids or bases.
- The presence of buffers ensures that even with the transport of CO₂, the blood does not become acidic.

6. **Conclusion:**
- Therefore, blood does not become acidic despite carrying CO₂ because of the buffering action of bicarbonate and the equilibrium maintained between carbonic acid and bicarbonate in the blood.

### Final Answer:
Blood does not become acidic although it carries carbon dioxide because buffers play an important role in carbon dioxide transport.

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