Diffusion, osmosis and active transport
Involoves osmosis, active transport and diffusion.
- Created by: GrasshopperBaby
- Created on: 12-02-14 12:46
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- Dissolved substances
- Diffusion
- Area of high concentration to area of low concentration
- Random movement until equalibrium
- Substances must be dissolved
- Rquires no energy
- Examples: lungs, leaf and small intestine
- Active Transport
- Requires energy from photosynthesis
- Protein carriers
- Goes against concentration gradient
- Used in root hair cells and small intestine villi cells.
- Needs the substances to be dissolved for it to happen
- Osmosis
- Movement of water through a partically permable membrane
- Requires no energy
- Goes down the concentration gradient
- Movement of water from a dilute soloution to a more concetrated soloution,
- Diffusion
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