Question

the plasma membranes of the adjacent cells are tightly packed at the apical face of the cells."

Answer 1

Tight junctions join epithelial cells near their apical surface to prevent the migration of proteins from the basolateral membrane to the apical membrane. The basal and lateral surfaces thus remain roughly equivalent to one another, yet distinct from the apical surface.

Answer 2

Found in epithelial cells that line the stomach, intestines, and urinary bladder.


Have transmembrane glycoproteins that extend into the intercellular space between adjacent cell membranes, attaching cells to one another.


Contribute to the stability of cells and anchor adjacent cells within a tissue.


Tight junctions join epithelial cells near their apical surface to prevent the migration of proteins from the basolateral membrane to the apical membrane.


The basal and lateral surfaces thus remain roughly equivalent to one another, yet distinct from the apical surface.