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Essay on Osmosis lab report | ||
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This is the first 1,000 characters of 672 words (2.69 pages) in the essay titled Osmosis lab report Diffusion is the movement of particles from an area of higher concentration to an area of lower concentration. Diffusion results because of the random movement of particles. The diffusion of water into and out of a selectively permeable membrane is called osmosis. Because of the selectively permeable membrane, nothing but water and other very small particles can be diffused through osmosis. The cell membrane is similar to the membrane mentioned above, so the cell would lose water because of osmosis if it were placed in an environment in which water concentration is greater than that of the cell.A solution is isotonic if the concentration of dissolved substances is the same as the concentration inside the cell. Osmosis does not occur in an isotonic solution. A hypotonic solution is a solution in which the concentration of dissolved substances is lower than the concentration inside the cell. If a cell were put in a hypotonic solution, osmosis will cause water to move through the cell membrane into the cell. A solution is hypertonic if its concentration of dissolved substances is greater than the concentration inside the cell. If a cell were placed in a hypertonic solution, it would lose water. All particles that pass through the plasma membrane by the process of diffusion do not require energy, so their movement is called passive transport. The transport of materials against a concentration gradient requires energy, so it is called active transport. The purpose of this ex... |
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Keywords: selectively permeable membrane, concentration gradient, water concentration, isotonic solution, hypertonic solution, hypertonic solutions, hypotonic solution, osmosis, graduated cylinder, nothing but water, particles, diffusion, hypothesize, petri dishes, substances, plasma membrane, cell membrane, sucrose, cells, random movement