Which of the following parts of the nephron is not situated in the cortical region of the kidneys ?

Options

A. Proximal convoluted tubule
B. Distal convoluted tubule
C. Malpighian corpuscle
D. Henie's loop

Answer

To determine which part of the nephron is not situated in the cortical region of the kidneys, we need to understand the structure of the nephron and the locations of its components.

1. **Identify the parts of the nephron**: The nephron consists of several parts, including:
- Renal corpuscle (which includes Bowman's capsule and glomerulus)
- Proximal convoluted tubule (PCT)
- Loop of Henle
- Distal convoluted tubule (DCT)
- Collecting duct

2. **Understand the regions of the kidney**: The kidney is divided into two main regions:
- **Cortical region**: This is the outer part of the kidney where the renal corpuscles, PCT, and DCT are located.
- **Medullary region**: This is the inner part of the kidney where the Loop of Henle and collecting ducts are found.

3. **Locate each part of the nephron**:
- The **proximal convoluted tubule (PCT)** is located in the cortical region.
- The **distal convoluted tubule (DCT)** is also found in the cortical region.
- The **Loop of Henle** extends into the medullary region.
- The **collecting duct** is primarily located in the medullary region.

4. **Determine which part is not in the cortical region**: Since the Loop of Henle and the collecting duct are located in the medullary region, we can conclude that the **Loop of Henle** is the part of the nephron that is not situated in the cortical region.

5. **Final answer**: The part of the nephron that is not situated in the cortical region of the kidneys is the **Loop of Henle**.