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19 February, 10:25

The digestive tract lining contains epithelial (outer lining) cells that do not allow food particles to randomly go inside the body except through specific proteins on their cell membrane. Which of the following structure blocks random diffusion of food particles between epithelial cells:A) DesmosomesB) Gap junctionsC) PlasmodesmataD) Tight junctionsE) Cell wall

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  1. 19 February, 12:25
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    D) Tight junctions

    Explanation:

    Based on the information provided within the question it can be said that the structure that performs this function are known as tight junctions. This structure has two different functions. The first being to limit the passage of molecules and ions through the space between cells, and the second function is that is blocks the movement of important membrane proteins between the epithelial cells
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