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Osmosis
Explain how water functions as a solvent in living organisms, particularly in relation to digestion, excretion, and transportation.
9
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90
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63
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90 min
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CambridgeIGCSEBiologyMovement into and out of cells
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Osmosis outcomes9 objectives
- Explain how water functions as a solvent in living organisms, particularly in relation to digestion, excretion, and transportation.
- Identify that water moves through partially permeable membranes via osmosis.
- Identify that water enters and exits cells through the cell membrane by osmosis.
- Conduct an investigation into osmosis using materials like dialysis tubing.
- Conduct an investigation and explain the impact of immersing plant tissues in solutions of varying concentrations.
- Identify that plants are supported by the pressure of water within the cells pushing against the cell wall.
- Describe osmosis as the net movement of water molecules from a higher water potential region to a lower water potential region through a partially permeable membrane
- Discuss the effects on plant cells when immersed in solutions of different concentrations, using terms such as turgid, turgor pressure, plasmolysis, and flaccid.
- Discuss the significance of water potential and osmosis in how organisms absorb and lose water.
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