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Transcript
Transparency – Diffusion Through a Selectively Permeable Membrane The particles of scent in the demonstration moved from areas of high concentration (where it was sprayed) to areas of low concentration (the corner furthest from the origin) by a process called diffusion. Diffusion (and a process called osmosis for water) is the method used in the body to get materials into and out of the cell. The membrane works like this: _____ _____ _____ _____ _____ _____ Substances that are small enough to pass through the selectively permeable membrane may enter or leave the cell. Substances that are too large to pass through will either not enter, or will be trapped inside the cell. The lab activity will demonstrate how the process of diffusion works.