Removal of proximal convolured tuble from the nephron will result in :

Options

A. No change in quality and quantity of urine
B. No urine formation
C. More diluted urine
D. More concentrated urine

Answer

To solve the question regarding the removal of the proximal convoluted tubule (PCT) from the nephron and its effects, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Role of the Proximal Convoluted Tubule (PCT)**:
- The PCT is a crucial part of the nephron responsible for the reabsorption of various substances from the filtrate back into the blood. This includes solutes like sodium, potassium, glucose, and amino acids.

2. **Consequences of Removing the PCT**:
- If the PCT is removed, the reabsorption process of these solutes will be significantly impaired. This means that the solutes will not be absorbed back into the bloodstream.

3. **Impact on Water Reabsorption**:
- The reabsorption of solutes is essential for water reabsorption. When solutes are reabsorbed, they create an osmotic gradient that allows water to follow by osmosis. Without the PCT, there will be less solute concentration in the blood, leading to a higher water potential in the filtrate.

4. **Formation of Urine**:
- With the PCT removed, the filtrate will not have solutes reabsorbed, resulting in a higher volume of water remaining in the nephron. This leads to the production of urine that is more diluted, as there are fewer solutes present in the urine compared to normal conditions.

5. **Conclusion**:
- Therefore, the removal of the proximal convoluted tubule from the nephron will result in the formation of more dilute urine.

### Final Answer:
The correct answer is **C: more diluted urine**.

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