Angiotensinogen in converted into angiotensin by

Options

A. Renin
B. ADH
C. ANF
D. Aldosterone

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the conversion of angiotensinogen into angiotensin and which enzyme is responsible for this conversion.

2. **Identifying Angiotensinogen**: Angiotensinogen is a precursor protein produced by the liver. It is inactive until it is converted into angiotensin.

3. **Role of Renin**: The enzyme responsible for converting angiotensinogen into angiotensin is called renin. Renin is released by the juxtaglomerular cells in the kidneys when there is a decrease in renal blood flow.

4. **Conversion Process**: When renin is released into the bloodstream, it acts on angiotensinogen, converting it into angiotensin I. This is the first step in the Renin-Angiotensin-Aldosterone System (RAAS).

5. **Further Conversion**: Angiotensin I is then converted into angiotensin II by the action of angiotensin-converting enzyme (ACE), but the question specifically asks about the conversion of angiotensinogen to angiotensin, which is primarily angiotensin I.

6. **Evaluating Options**: The options provided are:
- Renin
- ADH (Antidiuretic Hormone)
- ANF (Atrial Natriuretic Factor)
- Aldosterone

Among these, only renin is responsible for the conversion of angiotensinogen to angiotensin.

7. **Conclusion**: Therefore, the correct answer is **renin**.

**Final Answer**: Angiotensinogen is converted into angiotensin by **renin**.

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