Osmosis and Water Potential
- Created by: Freja
- Created on: 13-04-21 15:18
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- Osmosis & Water Potential
- Cells
- Animal
- Low Water Potential Outside Cell
- Hypertonic Solution
- Crenation
- Water leaves the cell and so the cell shrinks.
- Crenation
- There is no cell wall, so the cell-surface membrane cannot stretch as much.
- So there is an increased pressure.
- Hypertonic Solution
- Equal Water Potential
- Isotonic Solution
- Water enters and leaves constantly at equal rates
- Isotonic Solution
- High Water Potential Outside Cell
- Hypotonic Solution
- Cytolysis
- Water enters the cell and the cell swells and bursts.
- Cytolysis
- The greater the water molecules, the greater the water potential.
- So the pressure is increased.
- Hypotonic Solution
- Low Water Potential Outside Cell
- Plant
- Low Water Potential Outside Cell
- Hypertonic Solution
- Plasmolysis
- Water leaves the cell so the contents shrink and the cell becomes flaccid.
- Plasmolysis
- Means the cytoplasm moves from the cell walls
- Hypertonic Solution
- Equal
- Equilibrium
- Water constantly enters and leaves at equal rates.
- Equilibrium
- High Water Potential Outside Cell
- Hypotonic Solution
- Turgid
- Water enters cell and it swells and becomes trugid.
- Turgid
- Hypotonic Solution
- Low Water Potential Outside Cell
- Animal
- Osmosis is the diffusion of water molecules across a partially permeable membrane down a water potential gradient.
- Water molecules move from an area of higher water potential to an area of lower water potential.
- Water potential is the potentil of water molecules to diffuse into or out of a solution
- Water Potential
- Water potential is the pressure exerted by water molecules as they collide with a membrane or container.
- Measured in kPa
- Pure water has a water potential of 0kPa (the highest value)
- All solutions have a negative water potential.
- Cells
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