Tight junctions are cell-cell junctions found between adjacent cells of the epithelium that lines the small intestine.What is the function of these cellular junctions?
A)to attach epithelial cells to a basement membrane
B)to seal the epithelium and prevent movement of substances between cells
C)to recognize pathogenic organisms present in the lumen of the small intestine
D)to release digestive enzymes into the intestinal lumen

Question

Quizplus · Accepted Answer

Tight junctions serve the function of sealing adjacent epithelial cells together, forming a barrier that prevents the movement of substances between cells. In the context of the small intestine, this barrier helps to regulate the absorption of nutrients and prevent harmful substances from entering the body.

Tight Junctions Are Cell-Cell Junctions Found Between Adjacent Cells of the Epithelium