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Under normal conditions which one is com...

Under normal conditions which one is completely reabsorbed in the renal tubule ?

A

Urea

B

Uric acid

C

Salts

D

Glucose

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding Renal Tubule Function**: The renal tubule is a part of the nephron in the kidney where the filtration of blood occurs, and substances are reabsorbed back into the bloodstream. 2. **Identifying Substances**: The question lists four substances: urea, uric acid, salts, and glucose. We need to determine which of these substances is completely reabsorbed under normal conditions. 3. **Glucose Reabsorption**: Under normal physiological conditions, glucose is completely reabsorbed in the renal tubules, particularly in the proximal convoluted tubule (PCT). 4. **Mechanism of Reabsorption**: The reabsorption of glucose occurs through active transport mechanisms in the PCT, ensuring that glucose is returned to the bloodstream and not lost in urine. 5. **Consequences of Incomplete Reabsorption**: If glucose is not completely reabsorbed, it will appear in the urine, leading to a condition known as glucosuria. This is often associated with diabetes mellitus, a condition characterized by high blood glucose levels. 6. **Comparison with Other Substances**: - **Urea**: Not completely reabsorbed; some is excreted in urine. - **Uric Acid**: The body produces very little uric acid, and it is not fully reabsorbed. - **Salts**: While some salts are reabsorbed, they are not completely reabsorbed. 7. **Conclusion**: Therefore, the only substance that is completely reabsorbed in the renal tubule under normal conditions is glucose. **Final Answer**: Glucose is completely reabsorbed in the renal tubule under normal conditions. ---
**Step-by-Step Solution:** 1. **Understanding Renal Tubule Function**: The renal tubule is a part of the nephron in the kidney where the filtration of blood occurs, and substances are reabsorbed back into the bloodstream. 2. **Identifying Substances**: The question lists four substances: urea, uric acid, salts, and glucose. We need to determine which of these substances is completely reabsorbed under normal conditions. 3. **Glucose Reabsorption**: Under normal physiological conditions, glucose is completely reabsorbed in the renal tubules, particularly in the proximal convoluted tubule (PCT). ...
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