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 can follow these steps:

### Step-by-Step Solution:

1. **Understand the Divisions**: The autonomic nervous system has two main divisions: the sympathetic division and the parasympathetic division. The sympathetic division is often referred to as the "fight or flight" system, while the parasympathetic division is known as the "rest and digest" system.

2. **Identify Key Functions**:
- **Sympathetic Division**: It prepares the body for stressful or emergency situations. It increases heart rate, dilates pupils, and inhibits digestion.
- **Parasympathetic Division**: It promotes a state of calm and conserves energy. It decreases heart rate, constricts pupils, and stimulates digestion.

3. **Compare Preganglionic and Postganglionic Neurons**:
- In the sympathetic division, the preganglionic neurons are shorter, and the postganglionic neurons are longer.
- In the parasympathetic division, the preganglionic neurons are longer, and the postganglionic neurons are shorter.

4. **Adrenal Medulla Stimulation**: Both divisions can influence the adrenal medulla, but primarily, the sympathetic division stimulates the adrenal medulla to release hormones like adrenaline (epinephrine) during stress.

5. **Determine the Exception**: The question asks for the aspect in which the sympathetic and parasympathetic divisions are not differentiated. Since both divisions can influence the adrenal medulla, this is the correct answer to the question.

6. **Final Answer**: The correct answer is that both divisions stimulate the adrenal medulla, which is the exception in their differentiation.