OSMOSIS & DIFFUSION
- Osmosis: is the movement of water from a dilute solution to a more concentarated solution, through a partially permeable membrane. the membrane allows the water molecules through but not the solute molecules, because they are too large. The effect of osmosis is to gradually dilute the solution.
- Diffusion: is the spreading of the particles of a gas, or of any substance in solution, which results in a net movement from a region where they are at a higher concentration to a region where they are at a lower concentration. For example, Oxygen required for respiration passes through all membranes by diffusion.
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