Diffusion, Particles move from high concentration to low concentration., Osmosis, Movement of water through a partially permeable membrane., Active Transport, Movement of substances using energy., Concentration Gradient, Difference in concentration between two areas., Partially Permeable Membrane, Lets some substances pass but blocks others., Plasma Membrane, Controls what enters and leaves the cell., Solute, Substance dissolved in a liquid., Solvent, Liquid that dissolves substances., Hypertonic, Solution with more solute outside the cell., Hypotonic, Solution with less solute outside the cell., Isotonic, Equal concentration inside and outside the cell., Facilitated Diffusion, Diffusion using proteins., Channel Proteins, Proteins that form passages in the membrane., Carrier Proteins, Proteins that carry substances across the membrane.

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