Getting in and out of cells
- Created by: Maddieecb
- Created on: 19-02-14 11:04
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- Getting in and out of cells
- Smelly particles spread through the air (diffusion)
- the closer to the source the stronger the smell (because of higher concentration the closer you are)
- Gas molecules diffuse quickly
- When a soluble substance is put in water the particles of the substance diffuse
- During diffusion particles move around and collide with one another...this spread them out
- clumped particles = high concentration
- Spread out particles = low concentration
- As particles spread out more in water the concentration equals out
- A difference in concentration between two areas = concentration gradient
- If difference in concentration is great diffusuion will occur rapidly!
- All plant and animal cells have a cell membrane
- Tiny holes in membrane for diffusion make it a partially permeable membrane (big particles don't fit)
- If concentration on each side of the memrane is different particles will diffuse through membrane
- The net movement of particles is from HIGH concentration to LOW concentration
- Diffusion results in an even distribution either side of cell membrane
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