Reabsorption of `Na^(+)` along with excretion of `K^(+)` is controlled by which one-of the following hormones?

Options

A. Prostaglondins
B. Aldosterone
C. Estrogen
D. Cortisol

Answer

To solve the question about which hormone controls the reabsorption of sodium ions (Na⁺) along with the excretion of potassium ions (K⁺), we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Function of Hormones**:
- Hormones are chemical messengers that regulate various physiological processes in the body, including electrolyte balance.

2. **Identify the Hormones Listed**:
- The question provides several options, including Prostaglandin, Aldosterone, Estrogen, and Cortisol. We need to evaluate each one in terms of its role in sodium and potassium regulation.

3. **Evaluate Prostaglandin**:
- Prostaglandins are lipid compounds that mainly influence inflammation, blood flow, and blood clotting. They do not play a significant role in sodium reabsorption or potassium excretion.

4. **Evaluate Aldosterone**:
- Aldosterone is a hormone produced by the adrenal cortex. It is specifically known for its role in regulating sodium and potassium levels in the body. Aldosterone promotes the reabsorption of sodium ions in the kidneys while facilitating the excretion of potassium ions.

5. **Evaluate Estrogen**:
- Estrogen is primarily involved in the development of female secondary sexual characteristics and does not have a direct role in sodium reabsorption or potassium excretion.

6. **Evaluate Cortisol**:
- Cortisol is a glucocorticoid hormone that primarily increases glucose levels in the blood and has some influence on metabolism but does not directly control sodium and potassium balance.

7. **Conclusion**:
- Based on the evaluation, the hormone responsible for the reabsorption of sodium and the excretion of potassium is **Aldosterone**.

### Final Answer:
The hormone that controls the reabsorption of Na⁺ along with the excretion of K⁺ is **Aldosterone**.

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