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Which of the following statement(s) regarding cell junctions is/are correct ?

A. Tight junctions help to stop substances from leaking across a tissue.

B. Adhering junctions perform cementing to keep neighbouring cells together.

C. Gap junctions facilitate the cells to communicate with each other by connecting the cytoplasm of adjoining cells, for rapid transfer of ions, small molecules and sometimes big molecules.

D. All of the above

Correct Answer :

D. All of the above


A cell junction (or intercellular bridge) is a type of structure that exists within the tissue of some multicellular organisms, such as animals. Cell junctions consist of multiprotein complexes that provide contact between neighbouring cells or between a cell and the extracellular matrix. There are three major types of cell junctions: adherens junctions, desmosomes and hemidesmosomes (anchoring junctions); gap junctions (communicating junction); tight junctions (occluding junctions).

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