BIOLOGY 151 Midterm: Cell-Cell Interactions [MIDTERM 1 MATERIAL]
23 Oct 2013
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Document Summary
Plasma membrane structure and function: create an environment inside the cell that is different from the conditions outside. The structure and function of an extracellular layer: the cell doesn"t stop at the membrane . The extracellular matrix in animals: ecm gives structural support. - link ecm directly to cell"s cytoplasm. - helps adjacent cells adhere to each other. Plant cell-to-cell attachment: middle lamella is the glue that holds plant cells together. Animal cell-to-cell attachment: animal cells have a middle lamella like layer of gelatinous polysaccharide. However, the structure that holds cells together can vary. Epithelial tissue cover organs and lines body cavities . Tight junctions: specialized proteins, which stitch two cells together to form a watertight seal. Desmosomes: proteins that link the cytoskeleton of adjacent cells. Structure: anchoring proteins (desmosomes) in each epithelial tissue bind together by catherins, or membrane proteins. These anchoring proteins then connect the cytoskeleton of adjacent cells through cytoskeletal intermediate filaments.
