conditions do cells gain or lose water? Did water move into the cell or out of the cell while it was surrounded by hypotonic solution? The water moved into the cell‚ because there was less water inside the cell than outside (there were fewer water molecules inside). 2. In which direction did the water move though the cell membrane when the cell was surrounded by the hypertonic solution? The water moved out of the cell because there was a higher concentration of water inside the cell than outside
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Estimating Osmolarity of Plant Cells Criteria Assessed: DCP Introduction In this experiment you will be estimating the osmolarity of potato cells by finding their change in weight in solutions of known molarity. The object is to find the molarity where the mass does not change. No net change in weight indicates that there has been no net gain or loss of water. This is a means of indirectly finding the osmolarity of the cells themselves. Apparatus 1 large potato Petri dish 7 x 250 ml beakers
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Syllabus Cambridge O Level Biology Syllabus code 5090 For examination in June and November 2011 Note for Exams Officers: Before making Final Entries‚ please check availability of the codes for the components and options in the E3 booklet (titled “Procedures for the Submission of Entries”) relevant to the exam session. Please note that component and option codes are subject to change. Contents Cambridge O Level Biology Syllabus code 5090 1. Introduction ............................
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specializing in violent behavior that has crossed the Mexican/American border to include recruitment of United States young citizens. Because it is not a matter of when the Zetas will breach our border areas but how forcefully and repeatedly‚ a Red Cell analysis is imperative to understand their criminal mindset and predict their imminent and future intentions. Penetration beyond our borders has already occurred not only with the shipment of drugs but also by way of attacks on U.S. law enforcement
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My Journey Through the Human Body My name is Ruby; I am a red blood cell. I am a dazzling ruby red color (hence my name) with a small area of inner pallor and I am very small: only about 6 µm in diameter. I get my red color from a protein chemical called hemoglobin‚ which is bright red. Hemoglobin not only gives me my beautiful color‚ it also contains the element iron‚ which makes it a good vehicle for transporting oxygen and carbon dioxide. I have a very important role in the circulatory system
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In solution hypotonic to the sheep’s red blood cells‚ the red blood cells will lyse‚ as a result of the water entering the cell via osmosis. First‚ a stock solution of NaCl was prepared at concentration 1.0M. Working solutions were made ranging from hypotonic to hypertonic with a negative control at isotonic solution (150mM). The solutions were diluted up to 4 mL into 5 test tubes‚ (0mM‚ 0.13mM‚ 0.15mM‚ 0.17mM‚ 0.3mM 0.5mM) using distilled water to dilute the stock solution. The working solutions
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is dominated by subsistence farmers with only a few engaged in commercial farming. Major food crops cultivated are cassava‚ maize‚ plantain‚ rice and vegetables. The youth are engaged in vegetable production of which cabbage cultivation predominates (MOFA‚ 2001). Cabbage (Brassica oleracea var capitata) is a temperate vegetable crop which has become very popular in tropical Africa. Its origin and centre of differentiation is thought to be in the west of the Mediterranean basin or in
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Rob the Red Blood Cell Rob is an ordinary bllod cell and does the same thing every day. This is not a boring life though as he get the thrills of the lumps and bumps of the circulatory system. Rob enters the Vena Cava and enters the right Atrium where he is then pushed through the Tricuspid Valve and into the right Ventricle. While in her he currently has no oxygen in his biconcave dome so he needs to go and get some. He goes through the Pulmonary Valve and up and out of the Pulmonary
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1.5 Constructing Your Health Decisions 1. For your assignment you will organize information to include influences on your health‚ a family member’s health or the health of another person. Be sure to include: at least two examples of different influences by media‚ technology‚ or public policy on you‚ your family‚ or community the effect of these influences on everyone’s health the responsibility a person has for enhancing one’s health. 2. Use the organizer below to help you brainstorm your
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according to Campbell et al. (1999)‚ water is the major constituent of cells. Reactions vital to life occur under aqueous conditions in the body and cells of all organisms‚ and the concentrations of reactants necessary for these reactions depend upon the amount of water present (Pough et al. 2004). By the process of osmosis‚ water moves from areas of lower to areas higher concentration across a water- permeable membrane‚ like a cell membrane (Nybakken and Bertness 2005). In order to maintain the proper
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