Which Of These Cell Junctions Form A Barrier To The Passage Of Materials?
Answer :
A. Keratin fibers
B. Plasmodesmata
C. Tight junctions
D. Desmosomes (anchoring junctions)
E. Gap (communicating) junctions
Correct Answer: C. Tight junctions
Tight junctions act like guardian locks between cells, creating a shield that blocks substances from freely moving between them. By sealing the gaps tightly, they safeguard tissue integrity and ensure only the right molecules pass through, keeping everything in balance for healthy function.
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