Answer:
Tight junctions form a barrier that prevents fluids from moving between cells.
Step-by-step explanation:
Tight junction proteins are molecules found at endothelial, close epithelial and myelinated cell junctions. This junctional complex of mutliproteins has a regulatory role in moving through the paracellular path of water, solutes and ions.
Tight junctions helps to bind the cells together which further prevents molecules from passing in between the cells and forms a barrier to the passage of material.
Hence, the correct answer is Tight junctions.