The maximum amount of electrolytes and water (70-80 per cent) from the glomerular filtrate is reabsorbed in which part of the nephron?

Options

A. Ascending limb of loop of Henle
B. Distal convoluted tubule
C. Proximnal convoluted tubule
D. Descending limb of loop of Henle

Explanation

To answer the question regarding where the maximum amount of electrolytes and water (70-80 percent) from the glomerular filtrate is reabsorbed in the nephron, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Nephron**: The nephron consists of several parts, including the Bowman's capsule, proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and collecting duct. Each part has a specific function in the process of urine formation.

2. **Identify the Process of Urine Formation**: Urine formation occurs in three main steps:
- **Filtration**: Blood is filtered in the glomerulus, producing glomerular filtrate.
- **Reabsorption**: This is where the body reclaims essential substances from the filtrate.
- **Secretion**: Additional waste products are secreted into the filtrate.

3. **Focus on Reabsorption**: The question specifically asks about the reabsorption of electrolytes and water. After filtration, a significant amount of the filtrate is reabsorbed back into the bloodstream.

4. **Locate the Proximal Convoluted Tubule (PCT)**: The PCT is the first segment of the nephron tubule that follows the Bowman's capsule. It is known for its role in reabsorbing a large portion of the filtrate.

5. **Quantify the Reabsorption**: Approximately 70-80% of the electrolytes and water from the glomerular filtrate are reabsorbed in the PCT. This is the highest percentage of reabsorption that occurs in any part of the nephron.

6. **Conclude the Answer**: Based on the information gathered, the correct answer to the question is that the maximum amount of electrolytes and water (70-80%) is reabsorbed in the **Proximal Convoluted Tubule (PCT)**.

### Final Answer:
The maximum amount of electrolytes and water (70-80 percent) from the glomerular filtrate is reabsorbed in the **Proximal Convoluted Tubule (PCT)**.

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