Perietal cells of mucosa in stomach secretes `:`

Options

A. Mucus
B. Pepsin
C. HCl
D. All of the above

Answer

**Step-by-Step Solution:**

1. **Identify the Cells**: The question asks about the parietal cells located in the mucosa of the stomach.

2. **Understand the Function of Parietal Cells**: Parietal cells are specialized cells in the stomach lining that play a crucial role in digestion.

3. **Determine the Secretions**: The primary secretion of parietal cells is hydrochloric acid (HCl), which is a key component of gastric juice.

4. **Additional Secretion**: Besides HCl, parietal cells also secrete intrinsic factor, which is essential for the absorption of vitamin B12 in the intestine.

5. **Review Other Options**: If presented with options, you should eliminate incorrect answers:
- Mucus is secreted by goblet cells, not parietal cells.
- Pepsin is secreted by gastric chief cells, not parietal cells.

6. **Conclusion**: The correct answer to the question is that parietal cells secrete hydrochloric acid (HCl) and intrinsic factor.

**Final Answer**: Parietal cells of the mucosa in the stomach secrete hydrochloric acid (HCl) and intrinsic factor.

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