The basic rhythm of respiration is controlled by

Options

A. Medullary rhythmicity centre
B. Apneustic centre
C. Pneumotaxic centre
D. Cardiovascular centre

Answer

**Step-by-Step Solution:**

1. **Identify the Question**: The question asks about the control of the basic rhythm of respiration.

2. **Understand the Options**: The options provided are:
- Medullary rhythmicity center
- Apnoeistic center
- Pneumotastic center
- Cardiovascular center

3. **Recall the Function of Each Center**:
- **Medullary Rhythmicity Center**: Located in the medulla oblongata, it is primarily responsible for setting the basic rhythm of breathing.
- **Apnoeistic Center**: Located in the pons, it helps to prolong inhalation and is involved in regulating the depth of breathing.
- **Pneumotastic Center**: Also located in the pons, it helps to inhibit the apnoeistic center and thus regulates the rate of breathing.
- **Cardiovascular Center**: Primarily involved in regulating heart rate and blood pressure, not directly in respiration.

4. **Determine the Correct Answer**: The medullary rhythmicity center is the primary center that controls the basic rhythm of respiration. It responds to levels of carbon dioxide, hydrogen ions, and oxygen in the blood to adjust the breathing rate.

5. **Conclude**: Therefore, the correct answer to the question is the **Medullary Rhythmicity Center**.

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