Why is adrenal gland called 4-S gland ?

Explanation

### Step-by-Step Solution:

1. **Definition of Adrenal Gland**: The adrenal gland is a pair of glands located on top of each kidney. They play a crucial role in the body's response to stress and regulation of various physiological functions.

2. **Understanding the Term "4-S Gland"**: The term "4-S" refers to four key functions of the adrenal gland:
- **Source of Energy**: The adrenal gland helps in providing energy during stressful situations.
- **Sugar Metabolism**: It regulates the metabolism of sugars in the body, primarily through the action of glucocorticoids.
- **Salt Retention**: The adrenal gland helps in retaining salt in the body, which is essential for maintaining blood pressure and fluid balance, primarily through mineralocorticoids.
...