GCSE - Human Physiology and Health An experiment to investigate what affect sucrose solution has on potato tissue. Background Osmosis is the movement of water molecules‚ across a partially permeable membrane from a region of high concentration of water to a low concentration of water molecules. A partially permeable membrane is a membrane with holes in it small enough for only water to go through it. Big molecules like glucose cannot fit through it. Osmosis allows plants to take in water
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before the food has entered your mouth? The reason why you salivate is because your body wants to release an enzyme called amylase. Amylase is the enzyme found in your saliva. The purpose of this enzyme is to help in the digestion process (McD‚ 2002). Enzymes are biological catalyst that help speed up the reaction by lowering the activation energy. These enzymes allow your food to be digested at a faster rate (National Institute of Asian Medicine‚ 2007). There are many factors that can affect the efficiency
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Enzyme Activity How does temperature affect enzyme activity? In this practical investigation‚ my aim is to discover how temperature will affect enzyme activity‚ by looking at the rate of reaction. I predict that the higher the temperature will be‚ the faster the reactions take place. However‚ I also think that there will be an optimum temperature‚ at which the reaction will work at its fastest; if the temperature goes beyond that‚ the reactions will stop altogether as the enzymes would have
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Temperature affects enzymes in two different ways: by increasing the kinetic motion of molecules‚ changing the rate of collisions between them and the hydrogen bonds it’s 3D structure(D. Fraser‚ 55). There is a specific temperature for every enzyme where activity is maximized‚ and also where an enzyme becomes denatured. An enzyme becomes denatured when it is heated at extreme temperature;
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How does advertising affect food choices When asked how people make food choices‚ many people say taste is the number one factor. Flavor‚ aroma‚ appearance and texture all work together to impact what you choose for your daily meals and snacks. However‚ decisions about food go beyond taste and smell‚ reflecting a complex web of social‚ environmental and economic influences adults and children may not even be aware of. We develop food preferences based on our family‚ region / country where we live
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Civil war and how food actually affected the war? With the fundamental to life we all need food‚ water‚ and shelter maybe the necessities of life‚ but some may argue also love is needed to live a life we want. With some great home cooking with a little love in that food you can never be mad at anyone while eating this‚ but what happens when that food isn’t available. Today‚ I researched what these civil war solders ate during this terrible time trying to steer this new nation in the their path
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over the food industry and have reduced the quality of our food for profit. In 1970‚ the five largest meat-packing companies managed only 25% of the industry. Today‚ the four largest manage 80% of the industry. They have taken over farming in America and have caused many negative effects for farmers‚ for the animals‚ and at our dinner tables. In the past‚ farmers were free to decide what they were going to grow and how they were going to grow it. Food was fresh and healthy. Today‚ food looks healthy
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Discussion The change in the amount of sucrose in the dialysis bag affected the amount of mass each bag loss or obtains. All the tubes contained different amount of sucrose concentrations. The higher molarity concentrations increased the movement of water to balance out the inside of the tube and the beaker. The greater amount of concentration gradient‚ in each tube‚ increased the rate of osmosis. This rate of osmosis is due to the net movement of water from an area of low concentration to
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Enzymes are catalytic proteins that selectively speed up chemical reactions without by consumed by the reaction itself (1). Enzyme activity is significantly affected by factors such as temperature‚ substrate concentration‚ enzyme concentration and pH. Enzymes are highly specific and only catalyse one specific chemical reaction‚ speeding up the reaction by lowering the activation energy‚ the energy required to start a chemical reaction (2). At high temperatures and with various mechanical forces or
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You find yourself sitting in a booth at eating a delicious burger at your favorite fast food restaurant. You are enjoying your burger when your breath starts leaving your body and start breathing heavily. The room starts to spin and all sound is muffled and you pass out. This is how fast food can affect the respiratory system. The first effect is‚ eating fast food can lead to obesity which affects the respiratory system by decreasing the volume of the lungs. This lowers the forced expiratory volume
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