Genetic expression of Na KATPAse inducible by-
**Core Concept**
The genetic expression of the sodium-potassium ATPase (Na K ATPase) enzyme is regulated by various factors that influence its activity and expression levels. This enzyme plays a crucial role in maintaining the resting membrane potential and ion balance in cells. The regulation of Na K ATPase expression is essential for cellular homeostasis and adaptation to changing environmental conditions.
**Why the Correct Answer is Right**
The correct answer is **Aldosterone**, which is a steroid hormone produced by the adrenal cortex. Aldosterone binds to the mineralocorticoid receptor (MR) in the collecting duct cells of the kidney, leading to an increase in the expression and activity of Na K ATPase. This results in increased sodium reabsorption and potassium secretion, ultimately increasing blood pressure. The increased expression of Na K ATPase is mediated by the transcription factor, serum and glucocorticoid-inducible kinase 1 (SGK1), which is activated by aldosterone.
**Why Each Wrong Option is Incorrect**
* **Option B:** Insulin is a hormone that regulates glucose metabolism, but it does not directly influence the expression of Na K ATPase.
* **Option C:** Angiotensin II is a peptide hormone involved in blood pressure regulation, but it does not directly induce the expression of Na K ATPase.
* **Option D:** Glucagon is a hormone produced by the pancreas that raises blood glucose levels, but it does not directly influence the expression of Na K ATPase.
**Clinical Pearl / High-Yield Fact**
Aldosterone escape is a phenomenon where the kidneys adapt to chronic aldosterone excess by reducing the expression and activity of Na K ATPase, leading to a decrease in sodium reabsorption and blood pressure.
**Correct Answer:** A. Aldosterone.