The 'terminal bar' visible under a light microscope in the apical region of intestinal epithelial cells represents which complex?
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Correct answer: The apical junctional complex
The terminal bar is a histological feature seen at the apical-lateral interface of columnar cells. It corresponds to the junctional complex, which provides both a seal (tight junction) and mechanical adhesion (adherens junctions and desmosomes) between cells.
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