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BIO NMDCAT CELL STRUCTURE & FUNCTION
nmdcat.online July 3, 2026

70. The specific class of intercellular junctions in animal endothelial layers that seals cells together to prevent the leakage of extracellular fluids is

A. Gap junctions
B. Tight junctions (zonula occludens)
✓
C. Macula adherens (desmosomes)
D. Plasmodesmatal channels

📝 Explanation

Tight junctions form a continuous fluid-tight seal between adjacent cell membranes, preventing materials from leaking between cells.

📖 Additional Information

  • Gap junctions
  • Tight junctions (zonula occludens)
  • Macula adherens (desmosomes)
  • Plasmodesmatal channels

Tight junctions form a continuous fluid-tight seal between adjacent cell membranes, preventing materials from leaking between cells.

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