The Question is from neet-zoology structural-organisation-in-animals , and it was created by the author T HARITHA

Question

Which statement regarding the specialized junctions between epithelial cells is INCORRECT?

T HARITHA · Accepted Answer

## CORE INFORMATION
✓ **Answer**: A
## CONCEPT FRAMEWORK
	**Primary Concept**: Epithelial cell junctions and their functions.
	**Related Topics**: Cell biology, Histology, Intercellular communication, Cell adhesion.
	**Prerequisites**: Basic understanding of cell structure and function.
## SOLUTION PATHWAY
**Given Information**:
	Multiple-choice question about the functions of different types of epithelial cell junctions.
**Method & Steps**:
	1. Analyze each option and compare it to the known functions of the cell junctions.
	2. Identify the option that misrepresents the function of a cell junction.
	3. Confirm the correct functions of the other options.
## OPTION ANALYSIS
[A] :x: **Tight junctions facilitate communication between adjacent cells.**: This statement is INCORRECT. Tight junctions create a seal between adjacent cells, preventing the passage of molecules and ions through the intercellular space. They regulate paracellular transport and maintain cell polarity, but they do NOT facilitate communication.
[B] ✓: **Adherens junctions contribute to the structural integrity of epithelial tissues.**: This statement is CORRECT. Adherens junctions use cadherins linked to actin filaments to provide cell-cell adhesion and contribute to the overall structural integrity of epithelial tissues.
[C] ✓: **Desmosomes provide strong adhesion between adjacent cells, using cadherins linked to intermediate filaments.**: This statement is CORRECT. Desmosomes are strong anchoring junctions that use cadherins linked to intermediate filaments to provide strong adhesion between adjacent cells, contributing to tissue strength and stability.
[D] ✓: **Gap junctions allow the passage of small molecules and ions between adjacent cells.**: This statement is CORRECT. Gap junctions are channels formed by connexins that allow the direct passage of small molecules and ions between adjacent cells, facilitating intercellular communication and coordination.
## LEARNING AIDS
	**Common Mistakes**:
		1. Confusing the functions of tight junctions and gap junctions: Tight junctions seal the intercellular space, while gap junctions allow communication.
		2. Overlooking the role of adherens junctions and desmosomes in structural integrity: Both contribute to cell adhesion and tissue strength.
	**Quick Tips**:
		1. Remember 'tight' junctions create a 'tight' seal.
		2. 'Gap' junctions create a 'gap' for communication.

T HARITHA · Answer

The correct Option is "Tight junctions facilitate communication between adjacent cells."

T HARITHA · Answer

Adherens junctions contribute to the structural integrity of epithelial tissues.

T HARITHA · Answer

Desmosomes provide strong adhesion between adjacent cells, using cadherins linked to intermediate filaments.

T HARITHA · Answer

Gap junctions allow the passage of small molecules and ions between adjacent cells.

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