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

question 20

Multiple Choice

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

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