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Tight Junctions in Cell Biology

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Questions and Answers

Which protein types are classified as tight junction membrane proteins?

Occludin and claudin (correct)

ZO-1 and JAMs

Cingulin and symplekin

Integrin and cadherin

What is the primary function of tight junctions in epithelial and endothelial cells?

Facilitating nutrient absorption

Conducting electrical impulses

Regulating muscle contraction

Providing strength and stability (correct)

What do tight junctions prevent to maintain membrane composition?

Lateral movement of proteins and lipids (correct)

Nutrient absorption

Fluid aggregation

Cellular respiration

Which mechanism anchors tight junctions to neighboring cells?

Attachment of tight junction membrane proteins to strands Signup and view all the answers

How do tight junctions contribute to the blood-brain barrier?

By limiting passage of substances between blood and brain fluid Signup and view all the answers

What function of tight junctions regulates the passage of small molecules?

Gate function Signup and view all the answers

Which of these proteins acts as scaffold proteins in tight junctions?

Cingulin Signup and view all the answers

What is a key role of tight junctions in maintaining cell polarity?

Keeping proteins confined to specific regions in the membrane Signup and view all the answers