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Biology Concepts & Connections Seventh Edition

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.

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