Electrolytes transport either actively or passively in this segment

Options

A. DL of Henel's loop
B. AL of Henel's loop
C. Both (1) and (2)
D. None of these

Answer

**Step-by-Step Solution:**

1. **Understanding Electrolytes**:
- Electrolytes are ions that help maintain the salt balance in the body. Common electrolytes include sodium (Na+), potassium (K+), and chloride (Cl-).

2. **Identifying the Segments of the Nephron**:
- The nephron is the functional unit of the kidney and consists of several segments, including the loop of Henle, which has two parts: the descending loop and the ascending loop.

3. **Function of the Descending Loop of Henle**:
- In the descending loop of Henle, the primary function is the reabsorption of water. This segment is permeable to water but not to electrolytes, meaning that no significant electrolyte transport occurs here.

4. **Function of the Ascending Loop of Henle**:
- The ascending loop of Henle is responsible for the active and passive transport of electrolytes. This segment is impermeable to water but allows for the reabsorption of sodium, potassium, and chloride ions. This transport can occur actively (using ATP) or passively (down the concentration gradient).

5. **Conclusion**:
- Therefore, the correct answer to the question regarding where electrolytes are transported either actively or passively is the ascending loop of Henle.

**Final Answer**: The segment where electrolytes are transported either actively or passively is the **ascending loop of Henle**.

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