Mucus secreting goblet cells of alimentary canal are the examples of  

Options

A. unicellular isolated glandular cells
B. multicellular glandular cells
C. multicellular isolated cells
D. langerhan cells

Answer

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks about the classification of mucus-secreting goblet cells found in the alimentary canal. We need to identify whether they are unicellular isolated glandular cells, multicellular glandular cells, multicellular isolated cells, or Langerhans cells.

2. **Define Goblet Cells**: Goblet cells are specialized epithelial cells that secrete mucus. They are found in the lining of various organs, including the alimentary canal.

3. **Identify the Characteristics of Goblet Cells**:
- **Unicellular**: Goblet cells are individual cells, meaning they are not part of a larger group of cells.
- **Glandular Function**: They function as glands because they secrete mucus, which is a product of glandular activity.
- **Exocrine Nature**: The secretion of mucus classifies them as exocrine glandular cells, as they release their product onto a surface rather than into the bloodstream.

4. **Evaluate the Options**:
- **Unicellular Isolated Glandular Cells**: This option fits because goblet cells are individual cells that secrete mucus.
- **Multicellular Glandular Cells**: This option is incorrect because goblet cells are not part of a multicellular structure.
- **Multicellular Isolated Cells**: This option is also incorrect for the same reason as above.
- **Langerhans Cells**: These are found in the pancreas and are involved in hormone secretion, not mucus secretion.

5. **Conclusion**: Based on the characteristics and functions of goblet cells, the correct answer is that they are examples of **unicellular isolated glandular cells**.

**Final Answer**: Unicellular isolated glandular cells.

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