_______junctions perform cementing to keep neighbrouring cells together.

Answer

**Step-by-Step Solution:**

1. **Identify the Type of Junctions**: The question asks about junctions that perform cementing to keep neighboring cells together. We need to determine which type of junction fulfills this function.

2. **Review Types of Junctions**: There are three main types of junctions mentioned: tight junctions, adherent junctions, and desmosomes.

3. **Understand the Function of Each Junction**:
- **Tight Junctions**: These junctions create a barrier that prevents the passage of molecules between cells.
- **Desmosomes**: These junctions provide mechanical stability by anchoring cells together but are not primarily for cementing.
- **Adherent Junctions**: These junctions are specifically designed to hold neighboring cells together through protein complexes.

4. **Focus on Adherent Junctions**: Adherent junctions are held together by protein complexes known as lectins and cadherins. These proteins bind the cells together and are linked to the actin cytoskeleton, providing structural support.

5. **Location of Adherent Junctions**: Adherent junctions are found in all epithelial tissues, which indicates their widespread role in maintaining tissue integrity.

6. **Conclusion**: Based on the information, the type of junction that performs cementing to keep neighboring cells together is the **adherent junctions**.

**Final Answer**: Adherent junctions perform cementing to keep neighboring cells together.

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