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Hello students, answer to the first question.
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Diffusion is a movement of substance from higher concentration to lower concentration.
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Factors which affect the rate of diffusion are mass of solute, temperature of the environment, the solvent density, concentration and solubility.
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Next, osmosis is a movement of water molecule from higher concentration to lower concentration through a cell's semipermeable membrane.
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Next, isotonic solution is having equal osmotic pressure and solute concentration.
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So, there will be no net movement of water molecule.
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Thus, there will be no effect on cell.
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Next is hypotonic solution.
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Here, there will be lower osmotic pressure and solute concentration.
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So, the water movement will be from environment into the cell.
00:56
So, this causes cells to swell...