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4. 20 Three types of cell juntions found in animal tissues

Biology Concepts & Connections Seventh Edition
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Tight, anchoring, and gap junctions.
The three types of junctions found in animal tissues to bind cells to form leakproof sheets.
tight junctions
The plasma membranes of neighboring cells are tightly pressed against each otherand knit together by protiens.
tight juntions
Forming continuous seals around cells, these junctions prevent leakage of fluid across a layer of cells or moving cells..
anchoring junctions
Function like rivets, fastening cells together into strong sheets. Intermediate filaments made of sturdy kertain protiens anchor these juntions in the cytoplasm.
anchoring junctions
Are common in tissues subject to streching or mechanical stress, such as skin and heart muscle.
gap junctions
Called communicating junctions, are channels that allow small molecules to flow through protienlined pores between cells.
gap junctions
Common in embryos, where communication between cells is essential for development.
anchoring junction
A muscle tear injury would probably involve the rupture of which type of cell juntion?
Tight, anchoring, and gap junctions.
In animal tissues, neighboring cells often adhere, interact, and communicate through what specialized junctions between them?
gap junctions
Allow substances to flow from cell to cell.