What is the dependent variable of the experiment? The term hypertonic describes a solution which has more solute (salt) and lesssolvent (water) than the cell. In this case the cell will lose water.However, after watering the plant, the cells become re-inflated with water and the plantOsmosis is the process where water moves across a selectively permeable cell membraneby diffusion. Water moves from the solution with more water to the solution with lessFor example, if you place a red blood cell in pure (distilled) water, it will quickly take upPre-Lab: Osmosiswater. The process of osmosis muşt be tightly controlled by cells, otherwise they will die.water until it bursts. That is why plasma, the liquid portion of our blood is made of waterwith proteins and salts dissolved in it, preventing the unnecessary gain of water by ourIn plants, osmosis is just as important. Plants with too little water will wilt. This happenswhen water moves out of the cells by osmosis. Without this water there iinside the cells and the plant can no longer support itself against the pull of gravity.stands upright. The effect of water loss on plant cells is shown in the diagram below.McKinley:pgs. 111-119/28/21Osmosis ExperimentBackgroundblood cells.little pressureThe ferm hypotonic describes a solution which has less solute (salt) and moresolvent (water) than the cell In this cose the cell will gain water.The Term isotonic describes a solution which hos an egual concentration of soluteean) and an equal amount of water as the cell In this case the water moves equallyinto and out of the ell.H2OH:0H20- H2OABCFigure 1A. Plant cell placed in pure water, This cell will become inflated because the water outsidethe cell is at a higher concentration than the water inside the cell. As water moves in byosmosis the vacuole fills up and presses out against the cell wall.B. Plant cell in salt solution equal to the concentration inside the cell. This cell has nooverall gain or loss of water because whatever moves out will be replaced by water movingin.47 C. Plant cell placed in a salt solution greater than the concentration inside the cell, Thiscell will lose water as the water moves by diffusion from higher to lower concentration.In this lab activity you will observe the effects of osmosis on plant cells. You will use theweight of cubes of potato to see how much water moves in and out of cells in differentsalt solutions.

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A variable is any characteristic, numbers, or quantity that can be measured or counted. A variable…