Abstract - The experiments done in class served for multiple purposes. It helped identify that diffusion is the shifting of molecules from one part to another that takes no energy‚ and that osmosis is just the flow of water through the cell membrane. The main purpose of the first experiment was to examine the movement of H2O and other materials in living and simulate systems. This was done through the dialysis tubing to mimic the cell membrane and measure the change of mass inside the tube filled
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Osmosis Experiment Diana Arrowood Grand Canyon University BIO-100L Biology Concepts September 16‚ 2011 Osmosis Experiment Directions Use the information below to complete the Osmosis Experiment. Materials 1 fresh baking potato Water Salt Four small containers (i.e.‚ drinking cups or clear glasses) A metric ruler Methods and Procedure 1) Place 1 cup (236 ml) of water in each of the 4 containers. In 2 of the containers‚ add 1 tablespoon (14.8 ml) of table salt and mix well until
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1.20‚ 1.49‚ 1.62 1.44 -2.04 Analysis ======== [IMAGE] [IMAGE] In the 1st experiment‚ as the concentration got higher‚ generally‚ the mass of the potatoes got lower‚ but the graph did not end up as a sigmoid curve which it is supposed to look like. In the 2nd experiment‚ as the concentration go higher‚ the mass of the potatoes got lower. The graph looks more like a graph with a sigmoid curve in but still‚ it is not exactly right‚ even though I did everything
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Osmosis Aim: To determine the concentration of cell sap in a potato cell. Osmosis is the movement of water through a semi-permeable membrane. It starts from a weak solution and becomes a more stronger solution until the concentrations on both sides are equal. To investigate the range of solutions needed to find the point at which the surrounding solution is the same as the cell sap in the vacuole.
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Experiment 2 : Transport Across Membrane Name : Matrix No : Group : B Semester : 1 Date of Experiment : 05.09.2013 Lecturer’s Name : Miss OBJECTIVE To study the effects of hypotonic‚ hypertonic and isotonic solutions on plant and animal cells. INTRODUCTION In cellular biology the term membrane transport refers to the collection of mechanisms that regulate the passage of solutes such as ions and small molecules through biological membranes‚ which are lipid bilayers
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How a person acts under pressure tells a lot about what that person is like. A valuable strategy is to observe yourself when the pressure is off and when the pressure is on‚ notice the differences and see if you can learn something that may help you become successful. If you put a grape into a press and turn up the pressure what happens? Well of course the grape gets squashed but what do you get? You only get 4 things; grape juice‚ grape pulp‚ grape seeds and grape skins. Why? Because no matter
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The Gallery I did my review on was at Illinois Central College in room 336B. The show was called “Three Graces Under Pressure” by Patrica McWilliams‚ Sherri Denault‚ and Margie Glass Sula. The artwork together felt very calming‚ peaceful‚ and abstract. There is wood artwork that has some kind of carving. The artistists call this artwork “Tinted Graphite on Wood Panel”. There is also some type of white clay sculptures sitting on a tree branch or either on a pedestal. Another part of the artwork is a
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The effect of environmental factors such as temperature‚ osmotic pressure‚ oxygen concentration and pH on microbial growth and survival Abstract: Microbial growth can be affected by different environmental factors such as temperature‚ osmotic pressure‚ oxygen concentration and pH. Six experiments were carried out in this report testing for microbial growth against different environmental factors. Good aseptic techniques were used to prevent contamination‚ resulting in a uniform set of results
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molecules of the food coloring equally distributed in the area of the water. Osmosis is a special type of diffusion where only the water molecules move. This happens through a selectively permeable membrane. It allows water and oxygen to move freely across the membrane. Osmosis only has an effect when the cell is in a hypotonic or hypertonic solution. A hypotonic solution is when the salt concentration
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Experiment: Osmosis in Sucrose Solutions Abstract We used dialysis tubing to simulate a semi-permeable membrane. Since molecules diffuse from their higher concentration to their lower concentration‚ water will move across the membrane in response to this concentration. While conducting this lab we were able to observe passive transport through diffusion and osmosis. Introduction Osmosis is a specialized case of diffusion that involves the passive transport of water. When osmosis occurs
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