Cell membrane and movement
- Created by: Jessica
- Created on: 16-11-14 15:09
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- Cell membrane and movement
- Hydrophilic
- Having a strong attraction to water
- Hydrophobic
- Lacking an affinity for water (repelling water)
- Selectively permeable
- A barrier that allows some chemicals to pass but not others
- Diffusion
- The movement of molecules or ions from a region of high concentration to one of low concentration
- Osmosis
- A form of diffusion in which water molecules move down a water potential gradient
- Water potential
- The potential for water to move out of a solution by osmosis
- Solute potential
- The effect of solutes lowering the water potential of the cell
- Plasmolysis
- When the cytoplasm of a plant cell loses water it shrinks and draws away from the cell wall (turgid/ plasmolysed)
- Phagocytosis
- Where a large particle may enter the cell, become enclosed by a vesicle and be transported through the cytoplasm
- Pinocytosis
- The entry of liquid into a cell by the same method as phagocytosis
- Exocytosis
- A method by which substances leave a cell after being transported through the cytoplasm in a vesicle
- Hydrophilic
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