Diffusion vs osmosis

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Diffusion vs osmosis

  1. 1. Diffusion Vs. Osmosis Biology
  2. 2. Definitions • Diffusion: – Movement of molecules from a place where there is a large amount (high concentration) to a place where there is none or a smaller amount (low concentration). • Osmosis: – Diffusion of water across a selectively permeable membrane
  3. 3. Diffusion Diagram • High Concentration • Low Concentration EquilibriumDiffusionBeginning
  4. 4. Osmosis Diagram • Selectively Permeable Membrane: Some substances can pass through and some cannot.
  5. 5. 3 Types of Solutions where OSMOSIS can take place • 1. ISOTONIC – amounts of water are equal inside and outside of the cell (EQUILIBRIUM) 93% 93 % 93 % 93% 93%
  6. 6. 3 Types of Solutions where OSMOSIS can take place • 2. HYPERTONIC – amount of water inside the cell is greater than outside of the cell. (CELL SHRINKS) 85% 85% 85% 85% 93%
  7. 7. 3 Types of Solutions where OSMOSIS can take place • 3. HYPOTONIC – amount of water inside the cell is less than outside of the cell. (CELL EXPANDS) 98% 98% 98% 98% 93%
  8. 8. Osmosis & Cell Wall • Cell wall is a rigid membrane, how is it affected by osmosis?

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