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 to another solution‚ a hypertonic solution has a lower concentration
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The author uses imagery to illustrate and give the reader a clear understanding of his thoughts about injustice. Dunbar uses imagery by stating‚ “ Till it’s blood is red on the cruel bars” (line 9). This shows the bird’s relentless efforts to escape. The author includes this to relate the bird’s struggles and hardships to his own dealing with injustice. Another way Dunbar uses imagery to relate to injustice is by stating‚ “ When his wing is bruised and his bosom sore‚ When he beats his bars and he
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understanding. Based on the labs you completed‚ answer the following questions: 1. Which solute(s) were able to diffuse into the right beaker from the left beaker? Which did not? Answer: The solute(s) that were able to diffuse Na+/Cl- ‚ Urea‚ Glucose. The solute that didn’t was Albumin. 2. Explain the relationship between the rate of diffusion and the size of the solute. What do you think changes in temperature such as cold/hot would have on the diffusion rate? Answer: The rate of diffusion
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Movement in and out of cells Diffusion: (mixing molecules) Molecules and ions in a liquid or a gas move continuously. The movement is quite random‚ and the particles change direction as they bump into one another. The particles collide more often when they are close together (when they are concentrated) and so they tend to diffuse‚ or spread out‚ until they are spaced evenly throughout the gas or liquid. The random movement of particles is due to their own kinetic energy. When the diffusion
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Identifying and comparing the main components of blood. By Jason T Morrison. Blood‚ what an amazing substance. It has only been since being set this task by one of my tutors‚ Dr C Dublon that I have truly realised how amazing blood really is. Blood is not as some people may think just made up of one component‚ but many different components working together in an almost symbiotic relationship. The average human being carries approximately five litres of blood‚ which is equivalent to about 8% of their
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Introduction A computerized simulation experiment will be conducted in order to study the cell transport mechanism via the cell’s selectively permeable membrane and passive processes of simple and facilitated diffusion. The plasma membrane is a gateway which allows nutrients to enter the cell and keep undesirable substances out‚ hence‚ making it selectively permeable. One method of transport is called active transport‚ which uses ATP to transport substances through the membrane. The other is
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ISOLATION AND CHARACTERIZATION OF A STEM CELL POPULATION FROM MENSTRUAL BLOOD [pic] Thesis submitted to The American University of Athens‚ to the Faculty of Science‚ in fulfillment of the requirements for Doctorate degree in Biomedical Science June 2011 Acknowledgements: This dissertation would not have been possible without the guidance and the help of several individuals who in one way or another contributed and extended their valuable assistance in the preparation and
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Glucose is one of the key nutrients required in the body. However‚ its amount in the body has to be regulated and maintained in a very narrow range. This regulation of glucose is performed by insulin hormone. Insulin is secreted at the pancreas and hence is referred to as pancreatic endocrine hormones. Insulin is secreted by beta cells‚ which are normally located at the pancreas. When the amount of glucose in the blood increases‚ the stimulus for insulin secretion triggered. The insulin level secreted
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Potato Osmosis and Diffusion Lab Report Emily Cocq Research Question: Will there be a difference in the experimented potato cores after being subjected to high concentrations of sugar? Introduction: Water can move through protein channels in cell membrane/cell walls. The water will move due to the water potential of the cells. If there is a greater concentration of solutes (chemicals) inside the cell than outside the cell and the chemicals can not move‚ then water will respond by moving
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9/17/2013‚ Lois Andersen & Claire Ma “The Power of Osmosis” The purpose of the lab was to discover‚ through osmosis‚ the concentration of sugar water in a potato. First‚ potatoes were cut into strips about 3 centimetres in length and six strips were individually massed. Next‚ the six strips were placed in 6 different Dixie cups‚ labelled A‚ B‚ Q‚ X‚ Y‚ and Z. Each of the Dixie cups were then filled just enough to cover the potato strips‚ with substances that matched the letters of the cups
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