Which is correctly matched

Options

A. Glomerulare filtrate - serum with protein
B. Glomerular filtration rate - 125 ml/min
C. Reabsorption - collecting tubule
D. Reabsorption of `Cl'` - Active absorption

Answer

To determine which option is correctly matched regarding excretory products and their elimination, we will analyze each of the four options provided.

### Step-by-Step Solution:

1. **Analyze Option 1: Glomerular Filtrate Serum with Proteins**
- Glomerular filtration occurs in the kidneys, specifically in the Bowman's capsule, which contains a tuft of capillaries known as the glomerulus.
- During ultrafiltration, substances are filtered from the blood into the Bowman's capsule.
- Proteins are too large to pass through the basement membrane of the Bowman's capsule and, therefore, are not present in the glomerular filtrate.
- **Conclusion**: This option is incorrect.

2. **Analyze Option 2: Glomerular Filtration Rate 125 ml per minute**
- The glomerular filtration rate (GFR) is a measure of how much blood is filtered by the kidneys per minute.
- The normal GFR is approximately 125 ml per minute, which translates to about 180 liters of filtrate produced per day.
- **Conclusion**: This option is correct.

3. **Analyze Option 3: Reabsorption occurs in the collecting tubule**
- Reabsorption is the process by which the kidneys reclaim water and solutes from the filtrate.
- The major sites of reabsorption are the proximal convoluted tubule (PCT), distal convoluted tubule (DCT), and the loop of Henle.
- While some reabsorption occurs in the collecting tubule, it is minimal compared to the other sites.
- **Conclusion**: This option is incorrect.

4. **Analyze Option 4: Reabsorption of chloride is active absorption**
- The reabsorption of chloride ions primarily occurs in the proximal convoluted tubule (PCT).
- This process is mainly passive, relying on the electrochemical gradient rather than active transport mechanisms.
- **Conclusion**: This option is incorrect.

### Final Conclusion:
The only correctly matched option is **Option 2: Glomerular Filtration Rate 125 ml per minute**.

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