Choose the wrong statement

Options

A. Tight junctions help to stop substances from leaking across a tissue
B. Adhering junctions perform cementing to keep neighbouring cells together
C. Gap junctions facilitate the cells to communicate with each other by connecting the nuclei of adjoining cells
D. The main function of cuboidal epithelium are secretion and absorption.

Answer

To solve the question "Choose the wrong statement," we will analyze each statement provided in the question and determine which one is incorrect based on our understanding of cell junctions.

### Step-by-Step Solution:

1. **Examine the First Statement:**
- **Statement:** "The tight junctions help to stop the substances from leaking across the tissue."
- **Analysis:** Tight junctions are indeed responsible for preventing leakage of substances between adjacent cells. They create a barrier that maintains the integrity of the tissue.
- **Conclusion:** This statement is **correct**.

2. **Examine the Second Statement:**
- **Statement:** "Adhering junctions perform cementing to keep the neighboring cells together."
- **Analysis:** Adhering junctions (or adherens junctions) do help in cementing neighboring cells together by forming a belt-like structure that provides mechanical stability to tissues.
- **Conclusion:** This statement is **correct**.

3. **Examine the Third Statement:**
- **Statement:** "Gap junctions facilitate the cell to communicate with each other by connecting the nucleus of their joining cells."
- **Analysis:** Gap junctions do allow communication between cells, but they do so through cytoplasmic connections (not by connecting nuclei). They consist of protein channels called connexons that connect the cytoplasm of adjacent cells.
- **Conclusion:** This statement is **incorrect**.

4. **Examine the Fourth Statement:**
- **Statement:** "The main function of the cuboidal epithelium are secretion and the absorption."
- **Analysis:** Cuboidal epithelium is indeed involved in secretion and absorption, and it is commonly found in glands and kidney tubules.
- **Conclusion:** This statement is **correct**.

### Final Conclusion:
The only wrong statement among the options given is the third one: "Gap junctions facilitate the cell to communicate with each other by connecting the nucleus of their joining cells."

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