Select the incorrect match.

Options

A. Conducting part- It extends from the external nostrils upto the terminal bronchioles.
B. Functional residual capacity - Volume of air that remains in the lungs after a normal expiration.
C. Carbonic anhydrase enzyme - It is found in a very high concentration in the plasma.
D. Pneumotaxic center.

Answer

To solve the question of selecting the incorrect match, we will analyze each option provided in the context of their definitions and functions.

### Step-by-Step Solution:

1. **Understanding the Conducting Part of the Respiratory System**:
- The conducting part of the respiratory system includes structures that transport air to the lungs. This extends from the external nostrils (nose) to the terminal bronchioles.
- **Conclusion**: This match is correct.

2. **Understanding Functional Residual Capacity**:
- Functional Residual Capacity (FRC) is defined as the volume of air that remains in the lungs after normal expiration. It is a measure of the air left in the lungs after a person has exhaled.
- **Conclusion**: This match is also correct.

3. **Analyzing Carbonic Anhydrase Enzyme**:
- Carbonic anhydrase is an enzyme that catalyzes the conversion of carbon dioxide (CO2) into carbonic acid (H2CO3) and bicarbonate ions (HCO3-). It is primarily found in red blood cells, not in high concentrations in plasma.
- The statement claims that carbonic anhydrase is found in very high concentration in the plasma, which is incorrect. It is present in small amounts in plasma.
- **Conclusion**: This match is incorrect.

4. **Understanding the Pneumotaxic Center**:
- The pneumotaxic center is a part of the brain that helps regulate the rhythm and rate of breathing. It plays a crucial role in the control of respiration.
- **Conclusion**: This match is correct.

### Final Answer:
The incorrect match is the third option regarding carbonic anhydrase enzyme being found in very high concentration in the plasma.

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