Osmosis and Water Potential Year 11 Emary Venter INTRODUCTION: The cell is the basic unit of living things‚ and is made up of multiple organelles. Organelles are membrane bound subdivisions‚ each specialised for a specific function. This experiment looks at the Plasma Membrane‚ which is a semipermeable layer surrounding the cell. It’s primary job is to control what goes in and out of the cell. Molecules can move across this membrane in either an active movement or a passive movement
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A chilling breath of wind assaulted her deadened cheeks for it was a rough night and the stars had cowardly hid away behind the dull‚ mute clouds. The predatory moon‚ bright and full; crept behind the cloudy sky stalking me as prey. Her voiceless shadow stumbled drunkenly as she battled through the hawkish rain to find shelter for the night. Her car had broken down a mile or so back. It had been hours since
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Unit 1 Written Evaluation (1968 words). For our unit one exam‚ we explored the dramatic concepts of justice‚ and whether or not justice could truly be achieved. In order to do so‚ our exam was partitioned into six one hour lessons each containing justice as a focus point‚ using different forms and techniques to explore in a variety of different ways. Firstly‚ we looked at how hot seating could be used to fully explore an emotionally realistic situation. Our main stimulus for this lesson was the
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It was 1867‚ December‚ 25 Lawrence woke up at 9:30 am to go get the kids breakfast and get them ready for school. I prepared two waffles for my son whose name is Jamison‚ I also prepared a waffle for my daughter whose name is Laura. At 10:00am the woke up and rushed quickly down the stairs in excitement ready for their breakfast. They quickly ate and began to sprint to the bright yellow school bus that was going to take them to school safely here and back. Finally it was to check the weekly mail
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transport are endocytosis‚ exocytosis‚ and phagocytosis. Passive transport does not require energy it is powered by the concentration gradient of the molecule. Examples of passive transport are diffusion‚ facilitated diffusion‚ filtration‚ and osmosis. In our Osmosis Lab I used a Grade a large egg from the grocery store. Its circumference is 5 ½ inches it is smooth with no cracks. I carefully place the egg in a clear plastic cup and fill the cup with vinegar. I immediately notice bubbles covering the
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Details | Page number | 1.0 Article Summary | 3 | 2.0 Introduction | 3 | 3.0 Analysis | | 3.1 Demand and Supply | 4-6 | 3.2 Substitute | 6 | 3.3 Shortage | 7 | 3.4 Elasticity | 8-9 | 3.5 Price ceiling | 10 | 3.6 Consumer and producer surplus | 11-13 | 3.7 Tax | 13-14 | 4.0 Conclusion | 15 | References | 16-17 | | | 1.0 Article Summary The article “Consumers complain cooking oil sold at higher than fixed price” which was published on November 27‚ 2012 talks about
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Diffusion and Osmosis Diffusion -the process by which molecules spread from areas of high concentratiion‚ to areas of low concentration. When the molecules are even throughout a space - it is called EQUILIBRIUM DIFFUSION Concentration gradient - a difference between concentrations in a space. Molecules will always move down the concentration gradient‚ toward areas of lesser concentration. Think of food coloring that spreads out in a glass of water‚ or air freshener sprayed in a room
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the substances that enter or leave the cell do so through diffusion. Osmosis‚ a type of diffusion‚ is the movement of water across a selectively permeable membrane. In osmosis‚ water diffuses across the area of lower solute concentration to that of higher solute concentration until the solute concentrations of the environment and the cell are equal. Tonicity‚ which is the ability of a solution to gain or lose water due to osmosis‚ results in an environment that is isotonic‚ hypertonic‚ or hypotonic
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Objective: To observe the effects of osmosis on eggs placed in vinegar (5% acetic acid)‚ syrup (60% sugar solution)‚ and water (100% distilled). Hypothesis: Hypothesis #1: It was hypothesised that the egg would gain 59 grams of mass after soaking in vinegar for 24 hours. Hypothesis #2: It was hypothesised that the egg would become larger when soaked in syrup than it once was due to the hypotonic environment. Hypothesis #3: It was hypothesised that the egg would soak in water for 72 hours‚ losing
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exterior and regulate the movement of substances in and out of the cell. Diffusion is how substances more in and out of the cell. There are several types of diffusion‚ but for the purposes of this lab‚ we will be focused on simple and osmosis. Simple diffusion and osmosis are vital for the diffusion of water and maintaining homeostasis. Homeostasis is the ability to maintain equilibrium and keep the organism alive. For example‚ if a cell is placed in a hypotonic solution there is more water inside the
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