Which of the following structures or regions is incorrectly paired with its function.

Options

A. Hypothalamus : production of releasing hormones and regulation of temperature, hunger and thirst.
B. Limbic system : consists of fibre tracts that interconnect different regions of brain, controls movement.
C. Medulla oblongata : controls respiration and cardiovascular reflexes.
D. Corpus callosum : band of fibers connecting left and right cerebral hemispheres

Explanation

To solve the question, we need to identify which structure or region of the brain is incorrectly paired with its function. Let's break down the options provided and analyze them step by step.

### Step-by-Step Solution:

1. **Understand the Brain Structure:**
- The brain is divided into three main parts: the forebrain, midbrain, and hindbrain. Each part has specific structures and functions.

2. **Evaluate the First Option: Hypothalamus**
- The hypothalamus is located in the forebrain.
- Its functions include regulating body temperature, hunger, thirst, and it has endocrine functions (producing releasing hormones).
- **Conclusion:** This pairing is correct.

3. **Evaluate the Second Option: Limbic System**
- The limbic system is also part of the forebrain.
- Its primary functions are related to emotions, motivation, and behaviors such as sexual behavior.
- The statement claims it consists of fiber tracts that interconnect different regions of the brain and control movement.
- **Conclusion:** This pairing is incorrect, as the limbic system is not primarily involved in controlling movement.

4. **Evaluate the Third Option: Medulla**
- The medulla is part of the hindbrain.
- It controls vital functions such as respiration, cardiovascular reflexes, and gastric secretions.
- **Conclusion:** This pairing is correct.

5. **Evaluate the Fourth Option: Corpus Callosum**
- The corpus callosum is a band of fibers that connects the left and right cerebral hemispheres, located in the forebrain.
- **Conclusion:** This pairing is correct.

6. **Final Conclusion:**
- The incorrect pairing is the limbic system with the function of controlling movement. The limbic system is primarily involved in emotional regulation and motivation, not in interconnecting brain regions for movement control.

### Answer:
The incorrect pairing is **Option B: Limbic System - consists of fiber tracts that interconnect different regions of the brain and control movement.**

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