Multiple Choice
Which of the following is not a cell cell junction?
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18. Cell Junctions and Tissues
Cell-Cell Junctions
Multiple Choice
In epithelial tissues, which type of cell-cell junction forms an impermeable barrier that prevents paracellular movement of solutes between adjacent cells?
A
Gap junction
B
Desmosome (macula adherens)
C
Tight junction (zonula occludens)
D
Adherens junction (zonula adherens)
Verified step by step guidance1
Understand the function of different cell-cell junctions in epithelial tissues by reviewing their roles in cell adhesion and communication.
Recall that gap junctions allow direct cytoplasmic communication between adjacent cells, enabling the passage of ions and small molecules.
Recognize that desmosomes (macula adherens) provide strong mechanical attachments between cells but do not form barriers to solute movement.
Identify that adherens junctions (zonula adherens) connect the actin cytoskeletons of neighboring cells, contributing to tissue integrity but not impermeability.
Focus on tight junctions (zonula occludens), which create a seal around the apical perimeter of epithelial cells, forming an impermeable barrier that prevents paracellular movement of solutes.
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