In kidney, glomerulus is involved in

Options

A. blood filtration for urine formation
B. reabsorption of salts
C. urine collection
D. all of the above

Answer

To answer the question "In kidney, glomerulus is involved in," we will follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of the Glomerulus**:
- The glomerulus is a network of capillaries located at the beginning of the nephron in the kidney. Its primary function is to filter blood.

2. **Filtration Process**:
- The glomerulus filters plasma from the blood to form a fluid called glomerular filtrate. This process is known as glomerular filtration.

3. **Components of Filtration**:
- The filtration occurs through three layers:
- **Endothelial layer** of glomerular blood vessels.
- **Basement membrane** which acts as a barrier.
- **Epithelium of Bowman's capsule**, which contains specialized cells called podocytes that have filtration slits.

4. **Ultrafiltration**:
- The filtration process is so fine that it allows almost all components of plasma, except proteins, to pass into the Bowman's capsule. This is referred to as ultrafiltration.

5. **Conclusion**:
- Given the options:
- A) Blood filtration for urine formation
- B) Absorption of salts
- C) Urine collection
- D) All of the above
- The correct answer is **A) Blood filtration for urine formation**. The reabsorption of salts occurs in the nephron tubules, and urine collection takes place in the collecting duct.

### Final Answer:
**A) Blood filtration for urine formation**

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