Extracellular function Structure Plant or Animal? plasmodesmata 1. Membrane protein complexes that strengthen the adhesion between adjacent cells, like rivets, to protect against pulling forces desmosomes Group 2 collagen 2. Small channels that form across the plasma membranes of adjacent cells; especially important in intercellular communication Group 1 animal tight junctions 3. Membrane proteins that create a watertight seal between cells Group 1 Group 2 cellulose 4. Small channels between cells that are otherwise surrounded by walls; enable movement of water and solutes between cells Group 1 Group 2 gap junctions 5. A polysaccharide that is used to synthesize cell walls, which protect cells and help maintain their shape Group 1 Group 2 animal 6. Long fibers of protein found in the extracellular matrix that provide structural support for cells Group 1 Group 2 plant
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Describe the structure and function of an animal plasma membrane. In your response, describe the primary biomolecules that formed the membrane, including the structure and how that structure forms a protective, semi-permeable barrier. Then, describe the other biomolecules commonly present in plasma membrane's and explain why scientist call them fluid mosaic structures.
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What characteristics do desmosomes bestow on tissues that use these adhesions to connect adjacent cells? a. They allow communication between adjacent cells. b. They form a watertight barrier between the cells. c. They use the extracellular matrix to indirectly connect adjacent cells. d. They provide strong connections to resist pulling forces.
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