The portion of the junctional complex primarily responsible for restricting the passage of molecules between adjacent epithelial cells is/are composed of
A) Gap junction
B) Hemidesmosomes
C) Macula adherens
D) Zonula adherens
E) Tight junctions

Question

Quizplus · Accepted Answer

Tight junctions are the portion of the junctional complex primarily responsible for restricting the passage of molecules between adjacent epithelial cells. Tight junctions prevent the movement of ions and other molecules between the cells and seal off the extracellular spaces. Gap junctions allow small molecules and ions to pass freely between cells, hemidesmosomes anchor the cells to the extracellular matrix, macula adherens provide mechanical strength and stability to the tissues, and zonula adherens connect the actin cytoskeletons of adjacent cells.

The Portion of the Junctional Complex Primarily Responsible for Restricting