Respiratory process is regulated by certain specialized centres in the brain. One of the following listed centres can reduce the inspiratory duration upon stimulation

Options

A. medullary inspiratory centre
B. pneumotaxic centre
C. apneustic centre
D. chemosensitive centre

Answer

To solve the question regarding which specialized center in the brain reduces the inspiratory duration upon stimulation, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Respiratory Centers**:
- The respiratory process is controlled by specific centers in the brain, primarily located in the medulla oblongata and pons.

2. **Identifying Key Centers**:
- The **Medullary Inspiratory Center** in the medulla oblongata is responsible for regulating the respiratory rhythm.
- Within the **pons**, there are two important centers: the **Apneustic Center** and the **Pneumotaxic Center**.

3. **Functions of the Centers**:
- The **Apneustic Center** promotes the inspiration process, which means it encourages longer inhalation.
- The **Pneumotaxic Center**, on the other hand, regulates and reduces the duration of inhalation. This center helps control the rate of respiration by shortening the inspiratory phase.

4. **Conclusion**:
- Given the functions of these centers, the one that specifically reduces the inspiratory duration upon stimulation is the **Pneumotaxic Center**.

### Final Answer:
The center that reduces the inspiratory duration upon stimulation is the **Pneumotaxic Center**.

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