Sympathetic division is differentiated from parasympathetic division in all except :-

Options

A. Stimulate adrenal medulla
B. Preganglionic is smaller than postganglionic nerve fiber
C. Always excitatory in nature
D. Has paired chain of ganglia

Answer

To solve the question regarding the differentiation between the sympathetic and parasympathetic divisions of the autonomic nervous system, we need to analyze the characteristics of both divisions and identify the statement that does not correctly differentiate them.

### Step-by-Step Solution:

1. **Understand the Sympathetic Division**:
- The sympathetic division is often referred to as the "fight or flight" system. It prepares the body for stressful or emergency situations.
- It stimulates the adrenal medulla to release hormones like adrenaline, which increases heart rate and energy availability.

2. **Understand the Parasympathetic Division**:
- The parasympathetic division is known as the "rest and digest" system. It conserves energy and promotes maintenance activities when the body is at rest.
- It generally promotes calming effects, such as slowing the heart rate and increasing intestinal activity.

3. **Identify Key Differences**:
- **Adrenal Medulla Stimulation**: The sympathetic division stimulates the adrenal medulla, while the parasympathetic does not.
- **Length of Nerve Fibers**: In the sympathetic division, the pre-ganglionic fibers are shorter than the post-ganglionic fibers, while in the parasympathetic division, the pre-ganglionic fibers are longer.
- **Nature of Response**: The sympathetic division is typically excitatory, while the parasympathetic division is more inhibitory or calming.
- **Ganglia Arrangement**: The sympathetic division has a paired chain of ganglia (sympathetic trunk), while the parasympathetic division has ganglia located near or within the target organs.

4. **Evaluate the Options**:
- The question asks for the statement that does not differentiate the two divisions.
- The statement "It is always excitatory in nature" is misleading because while the sympathetic division is excitatory, the parasympathetic division is not always excitatory; it can be inhibitory.

5. **Conclusion**:
- Therefore, the statement that does not correctly differentiate the sympathetic division from the parasympathetic division is the one that claims "it is always excitatory in nature," as this is not true for the parasympathetic division.

### Final Answer:
The sympathetic division is differentiated from the parasympathetic division in all except: "It is always excitatory in nature."