Which of the following specialised centre is present in the medulla region and primarily responsible for the regulation of respiration rhy thm

Options

A. Chemosensitive area
B. Respiratory rhythm centre
C. Pnecumotaxis centre
D. Receptors associated with aortic arch and carutid artery

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the specialized center located in the medulla region of the brain that is primarily responsible for regulating the rhythm of respiration.

2. **Identifying the Options**: The options provided are:
- A) Chemosensitive area
- B) Respiratory Rhythm Center
- C) Pneumotaxis Center
- D) Receptors associated with aortic arch and carotid artery

3. **Analyzing Each Option**:
- **A) Chemosensitive Area**: This area is involved in detecting changes in CO2 and H2O ions, but it does not directly control the rhythm of respiration. Instead, it helps signal the respiratory centers based on these levels.

- **B) Respiratory Rhythm Center**: This center is specifically responsible for generating and regulating the rhythmic impulses that control the rate and depth of breathing. It is located in the medulla and is crucial for maintaining the respiratory rhythm.

- **C) Pneumotaxis Center**: This center helps prevent over-inflation of the lungs by inhibiting inspiration, but it does not primarily regulate the rhythm of respiration.

- **D) Receptors associated with aortic arch and carotid artery**: These receptors are sensitive to changes in blood gases (like CO2 and O2) and help maintain homeostasis, but they do not directly regulate the rhythm of breathing.

4. **Conclusion**: Based on the analysis, the specialized center in the medulla that is primarily responsible for regulating the respiratory rhythm is the **Respiratory Rhythm Center** (Option B).

**Final Answer**: B) Respiratory Rhythm Center

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