Cell Junctions

Cell Junctions - Cell Junctions .Incertaintissues,however,the .AsshowninFigure1,threekin

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Cell Junctions The plasma membranes of adjacent cells are usually separated by extracellular fluids that allow  transport of nutrients and wastes to and from the bloodstream. In certain tissues, however, the  membranes of adjacent cells may join and form a junction. As shown in Figure 1, three kinds of cell  junctions are recognized:  Desmosomes  are protein attachments between adjacent cells. Inside the plasma  membrane, a desmosome bears a disk-shaped structure from which protein fibers extend  into the cytoplasm. Desmosomes act like spot welds to hold together tissues that undergo  considerable stress (such as skin or heart muscle).  Tight junctions
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This note was uploaded on 11/10/2011 for the course PT 101 taught by Professor Staff during the Spring '10 term at Texas State.

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