Cell MembranesCell membranes are made of phospholipids arranged into two layers. The cell membrane characteristic are very similar to the characteristics of bubbles because both are made from the similar phospholipid molecules.
Watch this video to see some of the characteristics of the cell membrane. |
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MicroscopesCells are VERY small. In order to see them you have to use a microscope. Watch this video to learn about how to use a microscope.
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Osmosis in ElodeaElodea is an aquatic plant with very thin leaves. This allows us to view the individual leaf cells under a microscope simply by placing a leaf onto a slide.
Elodea are fresh water plants. By adding salt water to the slide you can see how the cells respond to various concentrations of salt. |
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Water Bead OsmosisWater beads are made of super absorbent polymers. They inflate when soaked in water. Ms. Crowder soaked the water beads in a solution of sugar water but she forgot what concentration of sugar she used.
By soaking the water beads in different concentrations of sugar, and using what we know about osmosis, you can determine the concentration of the sugar she used. Remember, in isotonic solutions the water moves equally. |