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Osmosis In Cells Essay

767 words - 3 pages

[Type text] [Type text] [Type text]The Science of Osmosis and Diffusion 6The Science of Osmosis and DiffusionCory GreerTulsa Community College AbstractThe purpose of this lab to demonstrate the process of osmosis and diffusion of water or fluids in cell membranes. To achieve this we used a decalcified egg to closely model a cell membrane. We used two different solutions, a carbonated soft drinks (coke) and oil to observer two different substances with high and low water concentrations. We submerged the egg in both these substances for five minutes for a total of 20 minutes weighing each egg on the 5 minute interval. The results showed that, the egg submerged in oil gained more weight and took in more fluid but equalized more quickly than the egg submerged in coke.Osmosis and DiffusionIntroductionThe equilibrium of cellular fluidity is a necessary component to all life; it allows the cells to be selective about the fluids they let in. Diffusion and osmosis helps regulate how much fluid is actually in the cell to keep it from busting due to too many fluids, or wither and die due to too little fluids. The fluids in question can be hypotonic which is having fewer solutes than water, hypertonic which is having more solutes than water, and isotonic is an equal amount of solutes and water. All of this to say if the cell has a higher or lower concentration of water, it will absorb a selective amount of fluid based on that fluids water content level.The Purpose of this experiment is to replicate a cell membrane using an egg shell that has been decalcified as a model of a selective permeable membrane. Our hypothesis at the beginning revolves around the notion that the interior of the egg has a low concentration of water. So we predict that the egg submerged in coke will gain more fluid and weight than the one submerged in oil. Then the one in oil would remain roughly the same weight.Methods and MaterialsIn order to produce the desired model for a cell membrane we use a decalcified egg. To achieve this soak the egg in vinegar for 48-72 hours, this either fuses or destroys the shell making it soft and representative of a cell membrane. In order...

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