Cell–Cell Junctions and Extracellular Matrix (2A)
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QUESTION
What is the primary function of tight junctions (zonula occludens) in epithelia?
QUESTION
Which protein subunits assemble to form a connexon in a gap junction?
QUESTION
What is the basement membrane (basal lamina) primarily composed of?
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ANSWER
Laminin, type IV collagen, proteoglycans, and nidogen. These components form a thin, organized sheet separating epithelia from connective tissue.
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