Podcast
Questions and Answers
Which type of cell junctions specifically prevent small molecules from leaking across the cell sheet?
Which type of cell junctions specifically prevent small molecules from leaking across the cell sheet?
- Desmosomes
- Tight junctions (correct)
- Hemidesmosomes
- Anchoring junctions
Which of the following proteins is essential for the formation and function of tight junctions?
Which of the following proteins is essential for the formation and function of tight junctions?
- Claudins (correct)
- Occludin
- Tricellulin
- Vinculin
How do hemidesmosomes differ from desmosomes in terms of function?
How do hemidesmosomes differ from desmosomes in terms of function?
- Hemidesmosomes connect cells through a dense cytoplasmic plaque, while desmosomes connect cells via integrins.
- Hemidesmosomes connect adjacent epithelial cells, while desmosomes connect cells to the extracellular matrix. (correct)
- Hemidesmosomes prevent transepithelial leakage, while desmosomes are essential for cell-cell adhesion.
- Hemidesmosomes are found in heart muscle, while desmosomes are found in skin epithelium.
In the context of epithelial sheets, where are adherens junctions typically located?
In the context of epithelial sheets, where are adherens junctions typically located?
Why are desmosomes crucial in holding cells together, as illustrated by certain skin diseases?
Why are desmosomes crucial in holding cells together, as illustrated by certain skin diseases?
Which proteins are key components of type I hemidesmosomes?
Which proteins are key components of type I hemidesmosomes?
What is the main function of integrins in cancer progression?
What is the main function of integrins in cancer progression?
How do gap junctions differ from tight junctions in terms of cell membrane contact?
How do gap junctions differ from tight junctions in terms of cell membrane contact?
What size molecules can pass through gap junction channels?
What size molecules can pass through gap junction channels?
How do connexin Cx43 and Cx40 contribute to cell coupling in different tissues?
How do connexin Cx43 and Cx40 contribute to cell coupling in different tissues?
