Breathing rate in human is controlled by :

Options

A. Thalamus
B. Hypothalamus
C. Cerebellum
D. Medulla oblongata

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the control of breathing rate in humans. We need to identify which part of the brain is responsible for this function.

2. **Evaluating the Options**:
- **Option 1: Thalamus**: The thalamus acts as a relay station for sensory and motor signals but does not directly control breathing. Therefore, this option is incorrect.

- **Option 2: Hypothalamus**: The hypothalamus is involved in regulating body temperature and other autonomic functions but does not play a direct role in controlling the breathing rate. Thus, this option is also incorrect.

- **Option 3: Cerebellum**: The cerebellum is primarily responsible for motor control and coordination. It does not regulate breathing rate, making this option incorrect as well.

- **Option 4: Medulla Oblongata**: The medulla oblongata contains the respiratory centers that monitor the levels of oxygen and carbon dioxide in the blood. When carbon dioxide levels rise or oxygen levels drop, it sends signals to the respiratory muscles to initiate breathing. This makes it the correct answer.

3. **Conclusion**: After evaluating all options, the correct answer is **Medulla Oblongata** (Option 4), as it directly controls the breathing rate in humans.