Movement in Cells
- Created by: Laura
- Created on: 03-05-13 09:22
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- Movement in Cells
- Diffusion
- The movement of particles from an area of high concentration to an area of low concentration.
- Caused by random movement of particles in gases and liquids
- Passive
- Takes place down a concentration gradient
- Does not use energy
- Diffusion rates are affected by ...
- Concentration
- Temperature
- Available surface area
- The movement of particles from an area of high concentration to an area of low concentration.
- Osmosis
- A special type of diffusion
- Only water moves across a
partially permeable membrane from an area of high concentration to an area of
low concentration of water
- Moving down its concentration gradient
- Only water moves across a
partially permeable membrane from an area of high concentration to an area of
low concentration of water
- Takes place across cell membrane
- Cell membranes are partially permeable
- A special type of diffusion
- Active Transport
- Move across a selectively permeable membrane
- Substances are moved against a concentration gradient
- Uses energy produced by cellular respiration
- Move across a selectively permeable membrane
- Uses energy produced by cellular respiration
- Diffusion
- Diffusion rates are affected by ...
- Concentration
- Temperature
- Available surface area
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