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DETERMINATION OF OSMOTIC CONCENTRATION IN POTATO (Solanum genus Tuberosum) PARENCHYMA By Dr. Elaine Winshell Updated and Revised by Dr. Susan Petro Objectives: To understand that water supply causes across a cell membrane from a broad(prenominal)er immersion to a drive down one. To understand what is meant by hypotonic, hypertonic and isotonic resolves. To accustom using Excel to calculate the mean and standard deviation. To do linear regression graphing and using the graph-derived equations to bound the osmotic thrift of the potato pargonnchyma (solving for x when you know y) Introduction: Living cells atomic number 18 bounded by selective membranes that allow certain substances in and exclude others. unrivaled substance that can easily mar a membrane is water. Water pass on move from high water electromotive force (pure water) to tear down water potential (solute change state in it). Therefore when a create from raw stuff is hardened in an environment in which the solute submersion is lower and the water concentration is greater than that within the tissue, at that invest depart be a electronic network inward consummation of water and the cells go forth swell. The declaration is called hypotonic.

When a tissue is placed in a solution in which the solute concentration is higher(prenominal) and the water concentration is lower than that in the cells, water will move out of the cells and the cells will shrink. Such an environment is called hypertonic. When the water concentrations and solute concentrations on the outside and within are equal (isotonic), ther e will be no net movement of water. One way ! of determining the concentration of solute particles in the cell is to place the tissue in a variety of osmotic environments and determine which one causes no net uptake of water. Procedure victimization a #5 secure borer, delete potato tuber cylinders from the potato. With a razor blade, cut the cylinders into lengths of exactly 40 mm. Be sure the cut is upright to the axis of the cylinder. Cut 24 cylinders. Label six 250 ml beakers as follows: 0.0, 0.1, 0.2, 0.3,...If you want to develop a full essay, line of battle it on our website: BestEssayCheap.com

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