Argentaftin cells occur in

Options

A. Duodenum
B. Stomach
C. Ileum
D. Both B and C.

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where Argentaffin cells occur in the human digestive system. The options provided are duodenum, stomach, ileum, or both B and C.

2. **Identifying Argentaffin Cells**: Argentaffin cells are specialized cells that are known for their ability to take up silver stains. They are small and round in shape.

3. **Function of Argentaffin Cells**: These cells secrete serotonin, a neurotransmitter that plays a crucial role in muscle contraction. Specifically, serotonin helps in the contraction of muscles in the ileum (the last part of the small intestine) and the stomach.

4. **Analyzing the Options**:
- **Duodenum**: This is the first part of the small intestine, but Argentaffin cells are not primarily associated with it.
- **Stomach**: Argentaffin cells are present in the stomach, where they help regulate muscle contractions.
- **Ileum**: Argentaffin cells are also found in the ileum, contributing to muscle contractions there.
- **Both B and C**: Since Argentaffin cells are present in both the stomach and the ileum, this option is also valid.

5. **Conclusion**: Given that Argentaffin cells are found in both the stomach and the ileum, the correct answer is "both B and C."

**Final Answer**: Argentaffin cells occur in both the stomach and the ileum.

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