Longduct of nephron extended from cortext to medullary inner part

Options

A. Henel's loop
B. PCT
C. DCT
D. CD

Answer

**Step-by-Step Solution:**

1. **Identify the Structure**: The question asks about the "long duct of nephron" that extends from the cortex to the medullary inner part. In the nephron, the cortex is the outer region, and the medulla is the inner region.

2. **Understanding Nephron Components**: The nephron consists of various parts, including the Bowman's capsule, proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and the collecting duct.

3. **Locate the Long Duct**: The longest duct in the nephron that extends from the cortex (where the PCT and DCT are located) down into the medulla is the collecting duct.

4. **Function of the Collecting Duct**: The collecting duct is responsible for the final concentration of urine. It collects the filtrate from multiple nephrons and transports it to the renal pelvis, where it is then directed to the ureter and stored in the bladder.

5. **Conclusion**: Therefore, the long duct of the nephron that extends from the cortex to the medullary inner part is called the **collecting duct**.

**Final Answer**: The long duct of the nephron that extends from the cortex to the medullary inner part is called the **collecting duct**.

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