Absorption of major part of `Na^(+)` and `K^(+)` ions occurs in

Options

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

Answer

To solve the question regarding the absorption of major parts of `Na^(+)` and `K^(+)` ions, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Question**: The question asks where the majority of sodium (Na⁺) and potassium (K⁺) ions are absorbed in the nephron of the kidney.

2. **Identify the Nephron Parts**: The nephron consists of several parts, including the Bowman’s capsule, proximal convoluted tubule, loop of Henle, and distal convoluted tubule. Each part has specific functions related to filtration and absorption.

3. **Review the Functions of Each Part**:
- **Bowman’s Capsule**: This is primarily involved in the filtration of blood, not in the absorption of ions.
- **Proximal Convoluted Tubule (PCT)**: This is where a significant amount of reabsorption occurs, including sodium and potassium ions, as well as water and other solutes.
- **Loop of Henle**: This part is mainly involved in the concentration of urine and does not primarily absorb large amounts of Na⁺ and K⁺.
- **Distal Convoluted Tubule (DCT)**: While some absorption occurs here, it is not the primary site for Na⁺ and K⁺ reabsorption.

4. **Conclude the Major Absorption Site**: Based on the functions of these nephron parts, the proximal convoluted tubule is identified as the major site for the reabsorption of sodium and potassium ions.

5. **Select the Correct Option**: The correct answer to the question is the proximal convoluted tubule.

### Final Answer:
The major part of `Na^(+)` and `K^(+)` ions is absorbed in the **proximal convoluted tubule**.

---