Epithelial cells of the intestine involved in food absorption have on their surface :

Options

A. Pinocytic vesicles
B. Phagocytic vesicles
C. Zymogen granules
D. Microvilli

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the structures present on the surface of epithelial cells in the intestine that are involved in food absorption.

2. **Identifying the Relevant Structures**: The epithelial cells in the intestine are specialized for absorption, particularly in the small intestine where most nutrient absorption occurs.

3. **Recognizing the Role of Villi**: The inner surface of the small intestine is lined with finger-like projections called villi. These villi increase the surface area available for absorption.

4. **Microvilli**: On the surface of the villi, there are even smaller projections called microvilli. These microvilli further increase the surface area and are crucial for the absorption of nutrients.

5. **Eliminating Incorrect Options**: The transcript mentions that pinocytic vesicles and phagocytic vesicles are not involved in absorption in humans, and zymogen granules are not related to absorption either. Therefore, these options can be ruled out.

6. **Conclusion**: The correct answer is that epithelial cells of the intestine involved in food absorption have microvilli on their surface.

**Final Answer**: Epithelial cells of the intestine involved in food absorption have microvilli on their surface.

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