Which of these will be completely reabsorbed from glomerular filtrate normal conditions in the nephrons?

Options

A. Urea
B. Salts
C. Glucose
D. Uric acid

Answer

To answer the question of which substance will be completely reabsorbed from the glomerular filtrate under normal conditions in the nephrons, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Nephrons**: Nephrons are the functional units of the kidney, responsible for filtering blood and forming urine. Each nephron consists of several parts, including the glomerulus and the renal tubules.

2. **Role of Proximal Convoluted Tubule (PCT)**: The proximal convoluted tubule is the primary site for tubular reabsorption. This is where most of the reabsorption of nutrients, water, and electrolytes occurs.

3. **Substances in Question**: The question lists four substances: urea, salt, glucose, and uric acid. We need to determine which of these is completely reabsorbed.

4. **Reabsorption of Glucose**: Glucose is a key nutrient that is completely reabsorbed in the proximal convoluted tubule. This process occurs through secondary active transport, utilizing specific co-transporters.

5. **Comparison with Other Substances**:
- **Urea**: Urea is partially reabsorbed, not completely.
- **Salt (Sodium)**: Sodium is reabsorbed, but not completely; some is excreted.
- **Uric Acid**: Uric acid is also not completely reabsorbed; it is partially excreted.

6. **Conclusion**: Among the options provided, glucose is the only substance that is completely reabsorbed from the glomerular filtrate under normal conditions.

### Final Answer:
**Glucose** is completely reabsorbed from the glomerular filtrate in the nephrons under normal conditions.

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