Prorenin is secreted by

Options

A. Zymogene cells
B. Islet of langerhans
C. Sertoli cells
D. Hepatocytes

Explanation

**Step-by-Step Solution:**

1. **Identify the Source of Prorenin:**
Prorenin is a precursor enzyme that is secreted by specific cells in the body. The question asks where prorenin is secreted from.

2. **Examine the Options:**
The options provided are:
- A) Zymogen cells
- B) Islets of Langerhans
- C) Sertoli cells
- D) Hepatocytes

3. **Analyze Each Option:**
- **Zymogen Cells:** These cells are responsible for secreting inactive enzyme precursors, including prorenin.
- **Islets of Langerhans:** These are found in the pancreas and secrete hormones like insulin and glucagon, not prorenin.
- **Sertoli Cells:** Located in the testes, these cells support sperm development and do not secrete prorenin.
- **Hepatocytes:** These are liver cells that perform various functions, including metabolism, but they do not secrete prorenin.

4. **Select the Correct Answer:**
Given the analysis, prorenin is secreted by Zymogen cells. Therefore, the correct answer is **A) Zymogen cells**.

5. **Understanding the Function of Prorenin:**
Prorenin is an inactive form of the enzyme renin, which is involved in the digestion of milk protein, specifically casein. When activated, prorenin converts to renin, which plays a crucial role in the digestion process.

**Final Answer:**
Prorenin is secreted by **Zymogen cells**.

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