Which is not correctly matched ?

Options

A. Henle's loop` Concentration of urine
B. Distal convoluted tubules `rarr` Absorption of glucose and amino acids
C. Bownan's capsule `rarr` Glomerular filtration
D. Collecting duct `rarr` maintain interstitial osmolarity

Answer

To solve the question "Which is not correctly matched?", we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Option 1: Henle's loop - Concentration of urine**
- The function of the Henle's loop is primarily to reabsorb sodium (Na+), potassium (K+), and water. This process is crucial for concentrating urine. Therefore, this option is correctly matched.

2. **Option 2: Distal convoluted tubule (DCT) - Absorption of glucose and amino acids**
- The distal convoluted tubule (DCT) is responsible for the reabsorption of potassium (K+) and hydrogen ions (H+), and it plays a role in maintaining acid-base balance. The absorption of glucose and amino acids occurs in the proximal convoluted tubule (PCT), not the DCT. Therefore, this option is NOT correctly matched.

3. **Option 3: Bowman's capsule - Glomerular filtration**
- Bowman's capsule surrounds the glomerulus, which is a tuft of capillaries involved in the process of glomerular filtration (or ultrafiltration). This option is correctly matched.

4. **Option 4: Collecting duct - Interstitial osmolarity is maintained**
- The collecting duct is involved in the reabsorption of water and urea, which helps maintain the osmolarity of the interstitial fluid. This option is also correctly matched.

### Conclusion:
The option that is not correctly matched is **Option 2: Distal convoluted tubule - Absorption of glucose and amino acids**.