Lab Topic: Movement of Materials Across the Cell Membrane—Potato Tuber Cells Introduction: Osmosis is a form of diffusion in which water diffuses through a selectively permeable membrane from a region of high concentration to a region of lower concentration. This form of diffusion takes place when the molecules in high concentration are too large to move through the membrane. Three factors that determine cell membrane permeability are shape‚ size‚ and polarity. For this experiment‚ it must
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Egg Osmosis Lab The purpose of this lab was to demonstrate an example of a spontaneous reaction and its connection to metabolism; in this case it was osmosis. The procedures that we used to complete the experiment were taking five eggs that had been soaked in a sucrose solution and then placing each one in containers of sucrose that each had different levels of concentration. The mass of each egg was measured before being placed into the solutions and then every 10 minutes after until they had soaked
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Date: 28/11/13 EVALUATION OF THE EFFECT OF SODIUM CHLORIDE ON ONION EPIDERMAL CELLS INRODUCTION A living plant cell will shrinks or swells depending on the solute concentration of the cell in relation to the solute concentration of the fluid surrounding the cell (1). It follows that water will move from a region of high water concentration to a region of low water concentration therefore‚ if a cell is placed in a hypertonic solution water will move from the cell into the solution until the
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A Raisin in the Sun: Dependency “Weariness has‚ in fact‚ won in this room. Everything has been polished‚ washed‚ sat on‚ used‚ scrubbed too often. All pretenses but living itself have long since vanished from the very atmosphere of this room.”(23-24) A Raisin in the Sun is a play of dependency‚ where events are dependent on one other events. Monetarily‚ the Youngers depend on the insurance check to rescue them from the weariness and familiarity of their one room apartment. Between all the talk
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Osmosis in Red Onion Cells By: Youssef Gharib Brief Description of Osmosis in Red Onion cells: Osmosis is the diffusion of water from an area of low concentration to an area of high concentration across a semi-permeable membrane. The purpose of this lab is to compare the three different types of solutions affect on the relative size of the vacuole to the cell‚ the outer membrane of onion red cells (tunics) are used to figure out the different types. In the red onion you can see effects promptly
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Introduction: In this experiment‚ you will study osmosis. Your task is to design an experiment that will determine what concentration of solute is isotonic with the specimen cells. (Design) Procedure: You will be provided with the following materials: Potato‚ potato corer‚ scalpel‚ forceps‚ electronic balance 10 % salt solution‚ distilled water‚ 50 mL beakers‚ graduated cylinder‚ paper towel You must design a procedure that will enable you to determine the concentration
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A Raisin in the Sun Discussion questions English 3-4 Honors Ms. Thackeray Plot/Conflict – Using the handout‚ map the dramatic structure of the central conflict. Use cd from the play. Explain the existing conflicts between the Younger family members‚ Mama and Walter‚ Walter & Ruth‚ and Walter and Beneatha. How are these conflicts associated with the American Dream? What is the central conflict around which the play revolves? How does this central conflict relate to the notion of the American
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Frontina Taylor English Comp II Jaime Barrett Compare and Contrast A Raisin In The Sun Essay In the play‚ A Raisin in the Sun‚ by Lorraine Hansberry‚ and 1961 movie written by Lorraine Hansberry and presented by Columbia pictures‚ one of the most important themes is the American Dream. Many of the characters have hopes and dreams. They all strive towards their goals throughout. However‚ many of the characters have different dreams that clash with each other. Problems seem to
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Introduction This experiment was osmosis and diffusion. In this experiment I began by calculating the volume of a fresh chicken egg. Then to determine the effect of osmotic pressure change on a cell I soaked the raw chicken egg in vinegar for 24 hrs‚ and measured the volume of the egg after the shell had been dissolved by the vinegar. The egg was then submerged in corn syrup for 1-24 hrs‚ then measured and recorded the new egg volume. Finally the egg was submerged in water for 1-24hrs‚ again the
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partially supported because glucose left the bag and is proven by the positive test on the surrounding water. Also the beaker turned orange because of osmosis which attests to glucose leaving the bag. Iodine Potassium Iodine and water entered the bag. This was proven by the color change in the starch test as the bag turned black also because of osmosis. The only thing that the hypothesis lacked was that starch did not move at all. The beaker stayed yellow before and after because the bag is not permeable
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