Which part of nervous system controls the reflex activity of the body?

Options

A. Vermis
B. Pons
C. Spinal cord
D. Corpus callosum

Answer

### Step-by-Step Solution:

1. **Understanding Reflex Activity**: Reflex activity refers to involuntary movements that occur in response to a stimulus. These actions are quick and do not require conscious thought.

2. **Identifying the Nervous System Components**: The nervous system is divided into several parts, including the brain, spinal cord, and peripheral nerves. Each part has specific functions.

3. **Evaluating the Options**:
- **Vermis**: This part of the cerebellum separates the two hemispheres and helps maintain posture but does not control reflex actions.
- **Pons**: The pons is involved in regulating functions carried out by cranial nerves, but it is not primarily responsible for reflex actions.
- **Spinal Cord**: The spinal cord is a crucial part of the central nervous system and is responsible for controlling reflex actions. It processes sensory information and sends out motor commands without involving the brain for quick responses.
- **Corpus Callosum**: This structure connects the left and right hemispheres of the brain, facilitating communication between them, but it does not control reflex activities.

4. **Conclusion**: The spinal cord is the part of the nervous system that controls reflex activity in the body. It allows for rapid responses to stimuli, ensuring that actions can be taken quickly and efficiently.

### Final Answer:
The spinal cord controls the reflex activity of the body.

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