A collection of presentations, videos, labs, and animations on the topic of osmosis.

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The Osmosis Lab

by Alison Loomis

This osmosis/diffusion lab idea is easy and dramatic. The experiment is to understand the process of osmosis using yolk, syrup and vinegar. This resource is part of the Biology Links for One Laptop Per Child course which contains units on Exploring Life; The Cell; Genetics; Mechanisms of Evolution; The Evolutionary History of Biological Diversity; Plant Form and Function; Animal Form and Function; Ecology; and Astrobiology.
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4 Cellular Transport

by Robert Lucas

This unit includes resources, such as labs and PowerPoint presentations, on cellular transport for high school biology students. The PowerPoint covers the movement of materials across a membrane, the osmosis lab is an exercise using eggs, and there is an answer sheet for an Elodea plasmolysis lab. This unit is part of the Developing Biology course.
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This exercise introduces the dynamic complexes of proteins, carbohydrates, and lipids that comprise cell membranes. You should learn that membranes are fluid, with components that move, change, and perform vital physiological roles as they allow cells to communicate with each other and their environment. We also show that membranes also are important for regulating ion and molecular traffic flow between cells,and that defects in membrane components lead to many significant diseases. Instructions: The following problems have multiple choice answers. Correct answers are reinforced with a brief explanation. Incorrect answers are linked to tutorials to help solve the problem. Overview: 1. Membrane components 2. Lipids and aqueous barriers 3. Hydrophobic forces 4. Osmosis 5. Membrane transport 6. Membrane proteins 7. Diffusion 8. Cotransport 9. Water flow solution 10. Membrane stability 11. Phospholipids 12. Penetrating lipid bilayer 13. Cell junctions 14. Energy requirements for transport 15. Oral rehydration 16. Membrane flow This resource is part of the Biology Links for One Laptop Per Child course which contains units on Exploring Life; The Cell; Genetics; Mechanisms of Evolution; The Evolutionary History of Biological Diversity; Plant Form and Function; Animal Form and Function; Ecology; and Astrobiology.
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Inquiry: Diffustion

by Virginia Malone

This is a modification of the standard potato diffusion lab. It is extended to allow students to ask and answer their own questions, such as, “Will the potato do the same thing if I use sugar water instead of salt?” “What will happen if I use apple instead of potato?” “What will happen if I use a closed plastic bottle instead of a potato?”
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This video defines diffusion and osmosis.
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