The smallest functional unit of kidney is

Options

A. Nephron
B. collecting tubule
C. Glomerulus
D. Bowman's capsule

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the smallest functional unit of the kidney. This requires knowledge of kidney anatomy and physiology.

2. **Identifying Options**: The options provided are:
- A) Nephron
- B) Collecting tubule
- C) Glomerulus
- D) Bowman's capsule

3. **Analyzing Each Option**:
- **Nephron**: The nephron is the basic structural and functional unit of the kidney. It is responsible for the filtration of blood and the formation of urine.
- **Collecting Tubule**: This is a part of the nephron where urine is collected after filtration but is not a functional unit by itself.
- **Glomerulus**: This is a network of capillaries located within the nephron, involved in the filtration process, but it is not the entire functional unit.
- **Bowman's Capsule**: This is a cup-like structure that encases the glomerulus and is part of the nephron, but again, it does not represent the entire functional unit.

4. **Conclusion**: Since the nephron encompasses all the components necessary for filtration and urine formation, it is identified as the smallest functional unit of the kidney.

5. **Final Answer**: The smallest functional unit of the kidney is the **nephron**.

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