DIFFUSION REVIEW WORKSHEET 1. Define diffusion and what causes it to occur? The action of spreading the light from a light source evenly so as to reduce glare and harsh shadows. Diffusion is caused when entities are small and moving in molecules. They collide because they are moving at a random pace. The temperature causes diffusion. 2. Define the terms hypertonic‚ hypotonic‚ and isotonic solution. * Hypertonic: Having increased pressure or tone‚ in particular. * Hypotonic:
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Osmosis with an Egg. Purpose: We are taking a large single cell (the egg) and demonstrating Osmosis. Osmosis is a type of diffusion where the water molecules is the solution that is being moved. Osmosis is the movement of water through a semi-permeable membrane. Diffusion is the movement of molecules from an area of high concentration to an area of lower concentration. Introduction: When trying to create an osmosis reaction‚ it is important to understand Hypotonic and Hypertonic solutions.
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UNIT 21: Nutrition for Health & Social Care Task 2 - Know the characteristics of nutrients Submit – 07/11/14 This task meets P2 and M1. You need to; A) Use the table below to describe fully the characteristics of Carbohydrates‚ Protein‚ Lipids‚ Vitamins‚ Minerals and their benefit to the body. (This meets P2) B) You should also use the table to discuss the nutritional energy requirements for Young Children and Pregnant women/breastfeeding mothers comparing and contrasting similarities and differences
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BioLab3 Cell Membranes Lab Report Student Name: I. Diffusion Define the following terms. Solvent Solute Solution. Diffusion Concentration gradient Dynamic equilibrium EXERCISE 1 – Factors influencing rate of diffusion Predict how molecule size and temperature will affect the outcome of this experiment. Record the data from the information in the lab. Potassium Permanganate R.T. Methylene Blue R.T. Time (min) Total Diameter
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the partially permeable membrane. It is a very spontaneous process due to the downhill energy flow known as “water potential” by which‚ water molecules move from a region of higher water potential to a region of lower water potential. Pure water has the highest water potential value which is zero ( = 0 ). This process occurs in cells‚ regardless of animals or plants. Thus‚ osmotic pressure is a term used when the pressure exerted by water molecules passes through a partially permeable membrane during
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Singapore is a city of superlatives. The affluent city-state has a booming economy with investments pouring in. It’s also home to one of the world’s best health- and education systems. And it has an enviable reputation as being one of the world’s cleanest and safest cities. All those factors are reflected in Singapore’s architecture - dazzling skyscrapers and luxurious high-rises dot the island city. But the prosperity and economic boom are unable to mask one of Singapore’s most pressing problems:
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Osmosis The purpose of this lab is to study how membranes of plant and animal cells react when exposed to different solutions. The first experiment involves purple onion skin and the second involves rat blood in various solutions. I needed to understand certain terms before preforming this lab to be able to efficiently explain what is happening to the cells. Diffusion is the tendency of a substance to move down its concentration gradient from a more concentrated to a less concentrated area.
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movement of solute molecules from a higher to a lower concentration. b. The force with which a solvent moves across a semi-permeable membrane from a higher to a lower concentration. c. The movement of a substance across a semi-permeable membrane from a higher to a lower concentration. d. The movement of solute molecules from a lower to a higher concentration across a semi-permeable membrane. e. The active transport of a substance out of a cell to maintain equilibrium. 5. By which of the following
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perfume in the air. However there is a specialized type of diffusion called Osmosis. This is when water molecules moves from a region of high concentration of water to a region of low concentration of water thru a semi-permeable membrane. Osmosis will only occur thru a semi-permeable membrane (that is a membrane which selectively allows passage of certain types of molecules through it while restricting the movement of others) Examples of Osmosis includes a) The absorption of water by plants roots
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Osmosis of Sucrose Solutions of Different Molarities Through Dialysis Tubing (a Semi-Permeable Membrane) I. DESIGN A. PROBLEM/RESEARCH QUESTION 1. How does increasing molarity of sucrose affect osmosis through dialysis tubing? B. VARIABLES 1. The independent variable in this lab is the molarity of sucrose each dialysis bag is filled with. The time (30 minutes)‚ the temperature (23C) and the type of dialysis tubing used are all constants. 2. The dependent
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