Absorptin of `Na^(+)` and `K^(+)` ions does not occur in `:-`

Options

A. Loop of Henle
B. Bowman's capsule
C. Distal convoluted tubule
D. Proximal convoluted tubule

Answer

To solve the question "Absorption of `Na^(+)` and `K^(+)` ions does not occur in:", we need to analyze the function of different parts of the nephron, which is the functional unit of the kidney.

### Step-by-Step Solution:

1. **Understand the Nephron Structure**: The nephron consists of several parts including the glomerulus, proximal convoluted tubule (PCT), loop of Henle, distal convoluted tubule (DCT), and collecting duct. Each part has specific functions related to filtration and absorption.

2. **Identify the Functions of Each Part**:
- **Glomerulus**: Primarily involved in the filtration of blood. It filters out large proteins and allows plasma to enter the nephron.
- **Proximal Convoluted Tubule (PCT)**: Responsible for the reabsorption of a significant amount of sodium (Na⁺), potassium (K⁺), glucose, and other ions and nutrients from the filtrate back into the bloodstream.
- **Loop of Henle**: Primarily involved in the concentration of urine. It does not significantly reabsorb sodium and potassium ions.
- **Distal Convoluted Tubule (DCT)**: Involved in the reabsorption of sodium and potassium ions, as well as other ions like H⁺.
- **Collecting Duct**: Also involved in the reabsorption of sodium and potassium ions.

3. **Determine Where Absorption Does Not Occur**: Based on the functions outlined:
- The **Loop of Henle** is the part of the nephron where significant absorption of sodium and potassium ions does not occur. It mainly focuses on water and urea reabsorption.

4. **Conclusion**: Therefore, the correct answer to the question is that the absorption of `Na^(+)` and `K^(+)` ions does not occur in the **Loop of Henle**.

### Final Answer:
The absorption of `Na^(+)` and `K^(+)` ions does not occur in the **Loop of Henle**.

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