move through a membrane out of the cell in order to make the water concentrations equal. This causes the cell to shrink (hypertonic). If the concentration of certain molecules is higher inside of the cell‚ then the water will move into the cell causing it to swell (hypotonic). When the molecule concentrations are equal on both sides of the membrane‚ water does not move (isotonic). In the human body‚ many salts and enzymes help to regulate a cell’s state and the processes necessary for the human
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ways across the membrane through the dialysis bag pores. Since both sides were water‚ there was a small amount of net movement. However‚ considering both sides were both water‚ there should have been roughly no net movement because the solution was isotonic‚ not an increase of roughly five percent. For the 0.2‚ 0.4‚ 0.6 0.8‚ and 1.0 Moles of sucrose solutions‚ the bag gained mass. The water had to diffuse across the membrane into the bag to space out the sucrose molecules because the beaker contained
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1. a. List four cell structures that were common to both plant and animal cells. (4 points) b. What structures were unique to plant cells? (2 points) c. What structures were unique to animal cells? (2 points)--Answer below: a. 1. Rough ER 2. Smooth ER 3. Golgi Apparatus 4. Nucleus b. 1. Chloroplast 2. Cell walls 3. Vacuole c.
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flexible and stiff. Core A was the most non-adjustable due to it being hypertonic which means that the total concentration of all the dissolved solute particles is greater than the other solution. Core B was isotonic meaning that it had an equal balance throughout. When two environments are isotonic it means that the total molar concentration of dissolved solutes is the same in both of them (equal). When cells are in an isotonic solution‚ movement of water out of the cell is exactly balanced by movement
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contain the ideas or writing of other individuals/authors. _Alexandra DeWitt_____________ __5/1/13____________ Author Date _10_________ Lab Section # Increasing Sucrose Concentrations Causes the Osmotic Concentrations of Disks of Potato Tubers to Decrease Abstract: Introduction: The biological membranes are composed of phospholipid bilayers‚ each phospholipid with hydrophilic heads and hydrophobic tails‚ and proteins. This arrangement of the proteins and lipids produces a selectively
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the larger particles. B. Potato Core Experiment In this experiment we estimated the osmolarity of potato tuber tissue by submersing different potato cores into sucrose solutions of 0.0-0.6M‚ and weighing the potato. We concluded that the osmolarity of the potato was about 0.4M since the weight of the potato did not change after it was incubated in the solution with 0.4M. We also found that the potato was hypertonic to sucrose solutions of 0.0-0.3M and hypotonic to 0.5-0.6M. C. Dialysis
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Rate of Osmosis vs Solute Concentration Introduction: In nature‚ the quest to reach equilibrium‚ or the state of rest or balance due to the equal action of opposing forces (http://www.dictionary.com). Osmosis and diffusion are two ways that cells reach this equilibrium‚ without exerting energy. Due to the unique nature of the phospholipid bilayer‚ small molecules can pass through the semipermeable membrane easily‚ through diffusion (https://www.biologycorner.com). Water‚ however‚ has a slightly more
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change in weight of potato tubers‚ this was conducted in order to explore the process of diffusion and osmosis and more importantly to investigate the question of “Does different concentrations of sucrose solutions have an effect on the final weight for the potato tubers?” In this experiment we estimated the osmolarity of potato tuber cores by submersing different potato cores into sucrose solutions of 0.0-0.6M‚ and weighing the potato. The results showed the weight of the potato tubers had the highest
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tubing lab and the potato lab. In the first experiment‚ the dialysis tubing acted as a semi-permeable membrane. A semi-permeable membrane is a membrane that allows certain substances to pass through. In this experiment‚ several variables‚ including glucose‚ starch‚ and iodine potassium iodide were tested for permeability through the dialysis tubing. In the second experiment‚ several potato tuber cylinders were tested in different sucrose solutions. The potato cylinders were tested
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Northern Kentucky University BIO 150L: Introduction to Biology I Instructor: Dr. Bethany Bowling Osmosis and Diffusion Report Estimating the Osmolarity of Plant Cells--Potato YAO ZHANG 03/26/2012 Introduction: It is undeniable that all cells have the kinetic energy. It will led the cells move randomly around to others. For this molecular movement‚ there are two results that might happen. Diffusion is one of them. Diffusion is the movement of molecules that between the
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