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Cell Biology: Cytoskeleton and Intercellular Junctions

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Cell Biology: Cytoskeleton and Intercellular Junctions

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Questions and Answers

What is the primary function of occluding junctions in cells?

To control the passage of material through the intercellular spaces

What is the characteristic feature of adhesive junctions in terms of their morphology?

They exist in two forms: deep to tight junctions and small circular patches called macula adherens (desmosomes)

What is the term used to describe the combination of zonula occludens, zonula adherens, and macula adherens?

Junctional complex

What is the size of the intercellular gap in communicating (gap) junctions?

2-3nm Signup and view all the answers

What is the structure that forms the hollow tube-like channels in communicating (gap) junctions?

Not specified in the text Signup and view all the answers

How do cells interact with each other through occluding junctions?

The cells come very close to each other and apparently fuse, leaving no intercellular spaces Signup and view all the answers

What is the primary function of communicating (gap) junctions?

To provide channels of communication between the adjacent cells Signup and view all the answers

What is the other name for occluding junctions?

Tight junctions or zonula occludens Signup and view all the answers

What is the purpose of zonula adherens in cell-to-cell adhesion?

Forms a continuous band around the cell Signup and view all the answers

What is the characteristic feature of macula adherens (desmosomes) in terms of their morphology?

Small circular patches Signup and view all the answers