Created by karim14 about 6 years ago
-Diffusion is the process by which products move in and out of cells down a concentration gradient - from an area of high concentration to an area of low concentration.
-Osmosis is the movement of water molecules. from an area of high water potential to an area of low water potential, across a partially-permeable membrane
Active transport is the movement across a cell membrane from a lower to a higher concentration. In active transport, particles move against the concentration gradient - and therefore require an input of energy from the cell.
Turgid cells allow a plant to stand upright and allow leaves to spread out for photosynthesis. The cell wall stops them bursting
Factors affecting the rate of movement of Substances
-Thickness of membrane (distance)-Surface area -Concentration Gradient (difference in the two concentrations)