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Diffusion and Osmosis - Diffusion Osmosis 1 You can...

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Diffusion & Osmosis 1. You can describe diffusion as the movement of gas from higher concentration to a lower concentration. 2. You can describe osmosis as the movement of H 2 O from higher concentration to a lower concentration. 3. You understand how living things and the cells in living things use these processes. Osmosis and diffusion are both passive transports (doesn’t use energy). Both are used by cells, as a free way of getting what they need. Table 1: Hypertonic, Hypotonic, and Isotonic Solution: If the fluid outside the cell has… Then outside fluid is… Water diffuses… Effect on cell …lower free water molecule concentration than cytosol …hypertonic …out of cell. Cell shrinks. …higher free water molecule concentration than cytosol …hypotonic …into cell. Cell swells. 1 | P a g e 8/17/09
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…same free water molecule concentration as cytosol …isotonic …into and out of cell at equal rates.
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