Find out incorrect statement w.r.t. the cortical nephrons

Options

A. Most common nephrons in human kidney are cortical nephrons
B. Bowman's capsule lies close to kidney surface
C. Vasa recta is reduced or absent in cortical nephrons
D. cortical nephrons Control volume of plasma under stress condition

Answer

To find the incorrect statement with respect to cortical nephrons, we can analyze the given statements step by step.

### Step-by-Step Solution:

1. **Understanding Nephrons**:
- Nephrons are the structural and functional units of the kidney. There are two types: cortical nephrons and juxtamedullary nephrons.

2. **Analyzing the Statements**:
- **Statement 1**: "Most common nephrons in the human kidney are cortical nephrons."
- This statement is correct. Cortical nephrons make up about 85% of the total nephrons in the human kidney.

- **Statement 2**: "Bowman's capsule of cortical nephrons lies close to the kidney surface."
- This statement is also correct. The Bowman's capsule of cortical nephrons is located in the outer cortex of the kidney.

- **Statement 3**: "The loop of Henle in cortical nephrons is short."
- This statement is correct. Cortical nephrons have a short loop of Henle that does not extend deeply into the medulla.

- **Statement 4**: "Cortical nephrons control volume of plasma under stress conditions."
- This statement is incorrect. Cortical nephrons primarily function under normal conditions, while juxtamedullary nephrons are responsible for regulating plasma volume under stress conditions, such as dehydration.

3. **Conclusion**:
- The incorrect statement regarding cortical nephrons is **Statement 4**.

### Final Answer:
The incorrect statement with respect to cortical nephrons is: "Cortical nephrons control volume of plasma under stress conditions."

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