(AQA GCSE B3.1.1) Diffusion and Active Transport
- Created by: Em
- Created on: 16-04-13 16:52
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- Diffusion and Active Transport
- Sometimes in cells the concentration of glucose is higher on the inside than the outside. The natural process is to diffuse out. This is blocked from happening. However, the concentration gradient does not allow glucose from the outside back in.
- ACTIVE TRANSPORT
- Movement of particles from an area of low concentration to an area of high concentration using energy from respiration.
- Examples
- Root hair cell absorbs water as well as mineral ions.
- Small intestine diffuses some glucose but also uses active transport in order to give enough to the blood.
- ACTIVE TRANSPORT
- Particles travel down the concentration gradient during diffusion, from high to low.
- Sometimes in cells the concentration of glucose is higher on the inside than the outside. The natural process is to diffuse out. This is blocked from happening. However, the concentration gradient does not allow glucose from the outside back in.
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