Although much `CO_(2)` is carried in blood, bloods does not become acidic because

Options

A. It is absorbed by the leucocytes
B. Blood buffers play an important role in `CO_(2)` transport.
C. It combines with water to from carbonic acid which is neutralized by `NaCO_(3)`
D. It is continuously diffused through tissues and is not allowed to accumulate

Answer

To solve the question "Although much CO₂ is carried in blood, blood does not become acidic because," we can break down the explanation into clear steps.

### Step-by-Step Solution:

1. **Understanding CO₂ Transport in Blood:**
- CO₂ is produced by cellular respiration and is transported in the blood to the lungs for exhalation. It can be carried in three forms: dissolved in plasma, as bicarbonate ions (HCO₃⁻), and bound to hemoglobin.

2. **Formation of Carbonic Acid:**
- When CO₂ enters the blood, it reacts with water (H₂O) to form carbonic acid (H₂CO₃) through the following reaction:
\[ CO₂ + H₂O \leftrightarrow H₂CO₃ \]
- This reaction is reversible and establishes an equilibrium.

3. **Role of Bicarbonate Ions:**
- Carbonic acid can dissociate into bicarbonate ions (HCO₃⁻) and hydrogen ions (H⁺):
\[ H₂CO₃ \leftrightarrow HCO₃⁻ + H⁺ \]
- The presence of bicarbonate ions plays a crucial role in buffering the blood.

4. **Buffering Action of Blood:**
- The blood has a buffering system that helps maintain a stable pH. The bicarbonate ions can react with excess hydrogen ions (H⁺) to form carbonic acid, which can then convert back to CO₂ and water, thus preventing a significant change in pH.
- This buffering action ensures that even with high levels of CO₂, the blood does not become overly acidic.

5. **Equilibrium Maintenance:**
- The equilibrium between carbonic acid, bicarbonate ions, and CO₂ allows the blood to maintain a neutral pH. The buffering system effectively neutralizes any potential acidity from the hydrogen ions produced during the dissociation of carbonic acid.

6. **Conclusion:**
- Therefore, despite the presence of CO₂ and the formation of carbonic acid, the blood does not become acidic due to the buffering action of bicarbonate ions and the equilibrium maintained in the blood.

### Final Answer:
Blood does not become acidic despite carrying much CO₂ because of the buffering action of bicarbonate ions, which helps maintain pH balance.