Brush border surface is the distinct feature of which of the following part of nephron?

Options

A. PCT
B. Ascending limb of loop of Henle
C. DCT
D. Collecting duct

Answer

To solve the question regarding the distinct feature of the brush border surface in the nephron, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Nephron Structure**:
- The nephron is the functional unit of the kidney and consists of several parts: glomerulus, proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and collecting duct.

2. **Identify the Function of Each Part**:
- Each part of the nephron has specific functions. The glomerulus is involved in filtration, while the PCT is primarily responsible for reabsorption of nutrients.

3. **Focus on the Proximal Convoluted Tubule (PCT)**:
- The PCT is known for its role in reabsorbing approximately 90% of the filtered substances, including glucose, amino acids, and sodium.

4. **Recognize the Brush Border Surface**:
- The brush border surface refers to the microvilli present on the epithelial cells of the PCT. These microvilli increase the surface area, facilitating greater reabsorption efficiency.

5. **Conclude the Distinct Feature**:
- Since the brush border surface is specifically associated with the PCT, it is the distinct feature of this part of the nephron.

6. **Final Answer**:
- The brush border surface is a distinct feature of the **Proximal Convoluted Tubule (PCT)**.