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Questions and Answers
What are intercellular junctions primarily formed between?
What are intercellular junctions primarily formed between?
- Cells and blood vessels
- Non-cellular surfaces only
- Cells and non-cellular surfaces (correct)
- Nerve cells and muscle cells
Where are desmosomes primarily located?
Where are desmosomes primarily located?
- In the blood vessels
- In connective tissue
- In superficial layers of skin or oral mucosa (correct)
- In bone tissue
What type of cellular junction connects a cell to an adjacent non-cellular surface?
What type of cellular junction connects a cell to an adjacent non-cellular surface?
- Hemidesmosome (correct)
- Tight junction
- Gap junction
- Desmosome
Which statement distinguishes hemidesmosomes from desmosomes?
Which statement distinguishes hemidesmosomes from desmosomes?
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What role do hemidesmosomes play in oral mucosa?
What role do hemidesmosomes play in oral mucosa?
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Study Notes
Intercellular Junctions
- Intercellular junctions are formed between cells and also between cells and non-cellular surfaces.
- These junctions provide mechanical attachment and allow for the passage of signals between cells.
Desmosomes
- Desmosomes are intercellular junctions found primarily in the superficial layers of the skin and oral mucosa.
- They act as strong attachments between cells, preventing them from detaching during mechanical stress.
- Desmosomes are also involved in tissue turnover and cell migration during tissue repair.
Hemidesmosomes
- Hemidesmosomes are intercellular junctions that connect cells to non-cellular surfaces, like the basement membrane.
- They play a crucial role in attaching epithelium to connective tissue in the skin and oral mucosa.
- Hemidesmosomes have a smaller attachment plaque and only tonofilaments on the cellular side compared to desmosomes.
- Hemidesmosomes are functionally half a desmosome.
- Hemidesmosomes contribute to the attachment of gingival tissue to tooth surfaces.
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Description
Test your knowledge on intercellular junctions, focusing on desmosomes and hemidesmosomes. This quiz covers the structure, function, and importance of these junctions in skin and oral mucosa. Explore how they contribute to mechanical attachment and tissue repair.
