Removal of proximal convoluted tubule from the nephron will be result in

Options

A. more concentrated urine
B. no change in qualit and quantity of urine
C. no urine formation
D. more diluted urine

Answer

### Step-by-Step Solution:

1. **Understanding the Nephron Structure**: The nephron is the functional unit of the kidney, and it consists of several parts, including the glomerulus, Bowman's capsule, proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and collecting duct.

2. **Function of the Proximal Convoluted Tubule (PCT)**: The PCT is responsible for the reabsorption of approximately 70% of the filtered water, along with essential ions and nutrients such as glucose and amino acids. This reabsorption is crucial for maintaining body fluid balance and electrolyte levels.

3. **Impact of Removing the PCT**: If the PCT is removed from the nephron, the primary function of reabsorbing water and solutes will be lost. As a result, the nephron will not be able to reabsorb the significant amount of water that it normally does.

4. **Consequences on Urine Formation**: Although urine formation will still occur, the absence of the PCT means that less water will be reabsorbed back into the bloodstream. This will lead to a higher volume of urine that is more diluted, containing a higher concentration of water relative to solutes.

5. **Evaluating the Options**:
- **More Concentrated Urine**: This is incorrect because the urine will be more diluted due to the lack of water reabsorption.
- **No Change in Quality and Quantity of Urine**: This is incorrect as the quality of urine will change (it will be more diluted).
- **No Urine Formation**: This is incorrect because urine formation will still occur, albeit in a diluted form.
- **More Diluted Urine**: This is correct because the removal of the PCT will lead to less water being reabsorbed, resulting in more diluted urine.

6. **Conclusion**: The correct answer is that the removal of the proximal convoluted tubule will result in more diluted urine.