Question

How does the tight placement of the cells help the tissue? ​

Answer 1

Tight junctions prevent the passage of molecules and ions through the space between plasma membranes of adjacent cells, so materials must actually enter the cells (by diffusion or active transport) in order to pass through the tissue.

Answer 2

Tight junctions between the epithelial cells prevent the glucose molecules from diffusing around and between the adjacent cells, prevent transport proteins from moving from one surface of the cell to another, and unite the epithelial cells into a continuous sheet that prevents the gut contents from leaking into the.