sicnes
- Created by: Jess
- Created on: 08-05-13 11:42
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- Osmosis
- Roots absorb water through osmosis, their surface area is big to speed it up.
- Osmosis occurs in red blood cells, water diffuses through the weak walls.
- When dealing with urea water diffsuses out of the kidney so that urea and water are separated.
- Active Transport
- Reabsorbtion in the kidneys before urea.
- Absorbed glucose into the blood stream.
- Minerals and water enter the plant from the root.
- The movement of molecules across a cell membrane into a region of higher concentration from low
- Molecules passing through a semi-permeable membrane to a region of low to high concentration.
- Gaseous exchange
- Diffusion down a concentration gradient (area of high to low)
- It occurs in the stomata with the guard cells controlling the gases in and out
- In the alveoli in the lungs, oxygen diffuses into the blood stream and carbon dioxide out.
- In the villi in the small intestine, soluble foods and glycose are reabsorbed into capilaries.
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