"Osmosis of elodea" Essays and Research Papers

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    Cell Membrane

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    The fluid mosaic model of the cell membrane. What is the fluid mosaic model? The fluid mosaic model is a model conceived by S.J. Singer and Garth Nicolson in 1972 to describe the structural features of biological membranes. The membrane is described to be fluid because of its hydrophobic integral components such as lipids and membrane proteins that move laterally or sideways throughout the membrane. That means the membrane is not solid‚ but more like a ’fluid’. The membrane is depicted as mosaic

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    of research you are pursuing‚ so for example‚ whenever I was researching the experiment that I performed in this assignment‚ I found many links to websites containing osmosis experiments‚ but I found very little information on osmosis experiments being performed using a salt solution‚ but found an abundance of sources showing osmosis experiments being performed using a sugar solution‚ this data may prove to be helpful in solidifying the reliability of my own results‚ but they are next to useless

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    Photosynthesis Lab Report

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    Introduction: Photosynthesis is a process to which some autotrophs such as plants produce their own food. It has two stages or reactions light-dependent and light-dependent reactions. The light dependent reactions are the first stage‚ where energy from sunlight is captures in Photosystem 2 and then 1‚ the electrons generated in Photosystem 1 then moves along the electron transport chain. The moving of electrons causes a hydrogen ion gradient that is used in the final step to produce ATP‚ by the

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    moved from outside the potato into the potato due to Osmosis‚ proving that the distilled water had a higher concentration of water‚ as water moves from a high concentration to a low concentration. I can also see that the glucose solution of 0.8M has a much lower water concentration then the cell sap in the potato tissue. I know this because the potato in the 0.8M solution decreased in weight by 0.5g. This means that due to Osmosis‚ water moved from inside the potato i.e. the higher

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    the water and sucrose‚ osmosis can no longer take place. Osmosis can only occur when water is traveling from a higher concentrated area to a lower concentrated area. Hydrostatic pressure occurs when the bag reaches maximum capacity. Water will enter the bag through osmosis but get pushed out through hydrostatic pressure. This works in a cycle and prevents the bag from obtaining more volume and mass. 1b. The curves for the 40% and 20% sucrose differ in the rate of osmosis because of their concentration

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    Diffusion

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    of diffusion is osmosis. In plant cells‚ water is constantly diffusing into the cell. If the concentration of water is higher outside the cell than inside‚ water moves into the cell. If the concentration of water is lower outside a cell‚ water moves out of the cell. It is easy to see the effects of osmosis on plants. When you forget to water the plant‚ the soil becomes dry. If the soil is dry‚ there is no water to soak up. As a result‚ the water leaves the plant through osmosis leaving it wilted

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    solutions (0.1 M) the mass of the carrot and potato tubers increases due to water moving into the protoplast of the cell from the sucrose solution by osmosis and at high concentrations of sucrose solutions (0.5 M) the mass of the carrot and potato tubers decreases due to water moving out of the protoplast of the cell to the sucrose solution by osmosis. At certain concentrations (0.18 M of the potato and 0.355 M for the carrot) the potato and carrot tubers don’t change in mass due to the water potential

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    Physio 9.0 Lab 1:3

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    Exercise 1: Cell Transport Mechanisms and Permeability: Activity 3: Simulating Osmotic Pressure Lab Report Pre-lab Quiz Results You scored 100% by answering 4 out of 4 questions correctly. 1. Which of the following is true of osmosis? You correctly answered: c. It is a type of diffusion. 2. Which of the following occurs when a hypertonic solution is added to cells? You correctly answered: d. The cells shrink. 3. The variable that affects osmotic pressure is You correctly answered: a. the concentration

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    concentration and percent change in mass. Table 1. Estimating osmotic concentration of potato tuber cells by change in mass method Sucrose Concentration (molarity) 0 0.1 0.2 0.3 0.4 0.5 % Change in mass 18 7.9 19.4 -1.7 -16.3 -23.7 Discussion Osmosis is the movement of water across a selectively permeable membrane from a solution that has a lower concentration to a solution that has a higher concentration. Water moves down a concentration gradient which is developed when there is a greater concentration

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    Seawater Paper

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    salinity‚ it is undrinkable; however‚ it can be converted into drinking water in many ways. Converting Seawater into Drinking Water While there are multiple ways to convert seawater into drinking water‚ reverse osmosis and distillation are two of the main ways that it is done. “Reverse osmosis is a process where pressure is used

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