Osmosis is the movement of water from an area of high concentration to an area of low concentration across a semi permeable membrane. An osmotic system is established when a semi-permeable membrane is placed between two solutions. In this biological systems context‚ osmosis is the exchange of water between the potato cell and the surrounding medium of varying sucrose concentrated solutions‚ with the plasma membrane being the semi- permeable membrane. Because water molecules have kinetic energy‚ they
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Digital Balance used to measure the mass of the potato strip before and after osmosis. Time should be kept constant when the potato strip is put into the solution Hypothesis: The mass of the potato strip will increase in water and dilute concentrations of sucrose depending on the concentration within the cell. When the concentration of the sucrose solution outside the cells of the potato strip will be less‚ the mass of the solution will increase as water molecules from outside will diffuse into
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In this experiment‚ we had to demonstrate the process of osmosis using potatoes‚ and to determine the concentration of the cytoplasm of the potato. To demonstrate this‚ we had 6 test tubes and poured in different sucrose solutions of the following concentrations: 0.0M‚ 0.1M‚ 0.2M‚ 0.5M‚ and 1.0M. Once added in with all the sucrose solutions‚ we added in the 6 cylindrical potatoes of equal diameter and length. Before and after putting it in the potatoes‚ we had to weigh the initial and the final mass
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The effect of osmosis on artificial cells with different concentrations of sucrose Alex McRae Biology 120-902 Grand Valley State University 1 Campus Drive Allendale‚ MI 49401 mcraeal@mail.gvsu.edu Abstract In this study‚ we tested the validity of osmosis in artificial animal cells. Osmosis is the diffusion of free water across a membrane. The purpose of the study was to calculate the rate of osmosis in artificial cells containing different
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Let’s get serious here for a second; a lot of us are way too serious. People think that to get anywhere in life you have to have determination. According to the Merriam-Webster Dictionary the word “Determination” means: the quality that makes you continue trying to do or achieve something that is difficult. We are told are whole lives that if you want to make it in life you have to be willing to make great sacrifices‚ work long nights‚ pretty much are a boring stick in the mud. I say‚ just like a
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in the play are used to tell the late life story of Troy Maxon and his relationship with family. From the start of the play‚ there is conflict and foreshadowing that shows Troy’s own belief that he has failed in life and that the world did not give him what he deserved. He believes that he has to venture outside of his family to find relief. At the start of the play‚ Wilson takes the audience into the seemingly happy life of Troy Maxon. The author then makes it clear that he felt like
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Introduction The reason of this experiment was to identify the properties and effects of osmosis. Osmosis can be defined as the diffusion of water through a selectively permeable membrane. (Miller/Levine) Osmosis occurs when there is an area of higher and lower concentration. Osmosis is a type of diffusion. Diffusion is when molecules move from an area of higher concentration to an area of higher concentration. The three types of concentrations are hypotonic‚ hypertonic‚ and isotonic. When in comparison
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Troy Maxon represents a modern tragic character very well due this is fatal flaw‚ and downfall by the end of the play. Though he may not meet the requirement of being a character of nobility or of high class‚ all the other parts of the definition of a tragic character fit him very well. We see throughout the play that his authoritarianist behavior causes him to treat his family in a way that distances him from them. By the end of the story the tragedy ends with Troy dead‚ and without his family.
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Introduction: This experiment was used to examine the hypothesis that: Osmosis is dependent on the concentrations of the substances involved. Diffusion is the passage of solute molecules from an area of high concentration to an area of low concentration (Campbell & Reece‚ 2005). An example is ammonia diffusing throughout a room. A solute is one of two components in a chemical solution. The solute is the substance dissolved in the solution. The solvent‚ the other component‚ is any liquid in
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the Liebeck case and in the following incidents? Was the lawsuit “frivolous” as some people thought‚ or serious business? The major issue is that McDonalds didn’t warn customers of the coffee being hot. After Liebeck one the case McDonalds finally put warning labels on their coffee. If you ask me this questions years I would of said it was frivolous but not learning more information on how serious Stella Liebeck burns really were. After reading all the evidence in the case study‚ I believe the lawsuit
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