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Investigating osmosis in potatoes.
Member rating: No Rating | Words: | Submitted: Tue Nov 18 2003
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INVESTIGATING OSMOSIS IN POTATOES Background of osmosis Osmosis is the movement of water from an area of a high concentration to an area of a low concentration across a partially permeable membrane. Osmosis is important in biology because cell membranes that surround animal cell are semi-permeable. Osmosis can occur in human cells and in plant cells but I want to focus on osmosis in plant cells. Plant cells have a cell surface membrane, just like animal cells, but outside this there is a thin cellulose cell wall. Inside a plant cell there is a solution of salts and other solutes, many of which are located in the vacuole. The cell surface membrane is partially permeable, just as is animal cells. But the cellulose cell wall is fully permeable to solutes as well as to water. Osmosis is the diffusion of water or another solvent through a selectively permeable membrane. This membrane is like...
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