Select the correct statement wrt nephrons

Options

A. Juxtamedullary nephrons have reduced Henle's loops
B. Vasa recta is well developed in cortical nephrons
C. Ascending limb of Henle's loop extends as DCT
D. Glomerulus enclose Bowman's capsule

Answer

### Step-by-Step Solution

1. **Understanding Nephrons**: Nephrons are the structural and functional units of the kidney. They play a crucial role in the filtration of blood and the formation of urine.

2. **Types of Nephrons**: There are two main types of nephrons:
- **Cortical Nephrons**: These make up about 85% of the nephrons. They are primarily located in the cortex of the kidney and have shorter loops of Henle.
- **Juxtamedullary Nephrons**: These constitute about 15% of the nephrons. They have long loops of Henle that extend deep into the medulla of the kidney.

3. **Analyzing the Statements**:
- **Statement 1**: "Juxtamedullary nephrons have reduced Henle's loop." - This statement is incorrect because juxtamedullary nephrons actually have long loops of Henle.
- **Statement 2**: "Cortical nephrons have a well-developed vasa recta." - This statement is also incorrect as cortical nephrons either lack a vasa recta or have it poorly developed.
- **Statement 3**: "The ascending limb of the loop of Henle extends as DCT." - This statement is correct. The ascending limb of the loop of Henle transitions into the Distal Convoluted Tubule (DCT).
- **Statement 4**: "Glomerulus encloses Bowman's capsule." - This statement is incorrect. It is actually Bowman's capsule that encloses the glomerulus.

4. **Conclusion**: Based on the analysis, the correct statement regarding nephrons is that the ascending limb of the loop of Henle extends as the DCT. Therefore, option number 3 is the right answer.