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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Osmosis Lab: Potatoes and Elodea Background Information: Cells have a need to regulate their internal environment. They need to be able to this because cells often find themselves in environments where the concentration of dissolved solids outside the cell is different from the number of dissolved solids inside the cell. Since the solids can not move across the membrane‚ the cell responds by moving water either into or out of the cell in an attempt to balance the number dissolved particles.
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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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Test 1 Study Guide 1. Respiration * Respiration * Gas exchange * Necessary because cells require oxygen. * Exchanging O2 and CO2 * Carbon Dioxide is a waste product and must be removed from the body. * Internal respiration = gas exchange at the cellular level. * Oxygen diffuses from the blood into the tissue cells. * External respiration = gas exchange at the alveoli level. * Oxygen from the inhaled air diffuses into the blood in the pulmonary
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Shier‚ Butler‚ and Lewis: Hole’s Human Anatomy and Physiology‚ 10th ed. Chapter 4: Cellular Metabolism Chapter 4: Cellular Metabolism I. Metabolic Processes A. Introduction 1. Metabolism is the sum total of chemical reactions within cells. 2. In metabolic reactions‚ the product of one reaction serves as starting materials for another metabolic reaction. 3. This chapter explores how metabolic pathways supply a cell with energy and how other biochemical
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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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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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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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Ch.1 1. John‚ who has just completed his first finance course‚ is unsure whether he should take a course in business analysis and valuation using financial statements since he believes that financial analysis adds little value‚ given the efficiency of capital markets. Explain to John when financial analysis can add value‚ even if capital markets are efficient. The efficient market hypothesis states that security prices reflect all available information‚ as if such information could be costlessly
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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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