In juxtamedullary nephrons

Options

A. vasa recta is prominent
B. loop of Henle is long
C. loop of Henle runs deep into the medulla
D. All of the above

Answer

### Step-by-Step Solution:

1. **Understanding Nephrons**:
- Nephrons are the functional units of the kidney. There are two main types: cortical nephrons and juxtamedullary nephrons.
- Cortical nephrons are primarily located in the outer cortex, while juxtamedullary nephrons are found near the boundary of the cortex and medulla.

**Hint**: Remember the location of the two types of nephrons as it helps in understanding their functions.

2. **Characteristics of Juxtamedullary Nephrons**:
- **Vasa Recta**: Juxtamedullary nephrons have a prominent vasa recta, which is a network of blood vessels that supplies the nephron and plays a crucial role in the concentration of urine.
- **Loop of Henle**: The loop of Henle in juxtamedullary nephrons is long and extends deep into the medulla. This length is important for the kidney's ability to concentrate urine.
- **Location of Bowman's Capsule**: The Bowman's capsule of juxtamedullary nephrons is located in the inner cortex.

**Hint**: Focus on the structure and function of the loop of Henle and vasa recta to understand their importance in juxtamedullary nephrons.

3. **Analyzing the Options**:
- Option 1: Vasa recta is prominent - **True**.
- Option 2: Loop of Henle is long - **True**.
- Option 3: Loop of Henle runs deep into medulla - **True**.
- Option 4: All of the above - Since all previous statements are true, this option is also correct.

**Hint**: When analyzing options, verify each statement against your understanding of the topic.

4. **Conclusion**:
- The correct answer to the question regarding juxtamedullary nephrons is **"All of the above"** as all statements about their structure and function are accurate.

**Hint**: Always summarize your findings to reinforce your understanding of the topic.

### Final Answer:
The correct option is **"All of the above"** regarding juxtamedullary nephrons.