Juxta Glomerular cells of kidneys secrete hormone :

Options

A. Angiotensinogen
B. Angiotensin-II
C. Coherin
D. Renin

Answer

**Step-by-Step Solution:**

1. **Identify the Juxtaglomerular Cells**: Understand that juxtaglomerular cells are specialized cells located in the kidneys, specifically in the walls of the afferent arterioles near the glomerulus.

2. **Function of Juxtaglomerular Cells**: Recognize that these cells play a crucial role in regulating blood pressure and fluid balance in the body.

3. **Hormone Secretion**: Know that the primary hormone secreted by the juxtaglomerular cells is renin. Renin is an enzyme that initiates a cascade of reactions leading to the production of angiotensin II, which helps regulate blood pressure.

4. **Evaluate the Options**:
- **Option 1: Angiotensinogen** - This is incorrect because angiotensinogen is produced by the liver, not the kidneys.
- **Option 2: Angiotensin II** - This is also incorrect as angiotensin II is produced from angiotensinogen through the action of renin.
- **Option 3: Querine** - This is incorrect; querine is not related to the function of juxtaglomerular cells.
- **Option 4: Renin** - This is the correct answer as renin is indeed secreted by the juxtaglomerular cells.

5. **Conclusion**: The hormone secreted by the juxtaglomerular cells of the kidneys is renin.

**Final Answer**: Renin

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