Digestive system 6.1.1 explain why digestion of large food molecules is essential * Large food molecules are polymers‚ broken down into monomers in order to be absorbed into the blood * Humans eat substances by other organsims‚ many which are not suitable for human tissues therefore they must be broken down and reassembled in a form that is suitable * Many molecules in foods are too large to be absorbed by the villi in the small intestine‚ the large molecules have to be broken down
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Introduction This report will investigate the six essential nutrients required in our diet. The report will provide the function of each nutrient and explore why they are vital for the body. Carbohydrates Carbohydrates are the most important nutrient for the body as it is the largest possible source of energy. Carbohydrate supplies the body with energy‚ which allows the brain to function more effectively and allows organs to operate sufficiently. When the body has energy this allows each
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159 THERMAL SCIENCE: Vol. 12 (2008)‚ No. 2‚ pp. 159-169 TECHNICAL ASPECTS OF BIODIESEL PRODUCTION FROM VEGETABLE OILS by Janahiraman KRISHNAKUMAR‚ V. S. Karuppannan VENKATACHALAPATHY‚ and Sellappan ELANCHELIYAN Original scientific paper UDC: 665.3:543.632.514.3 BIBLID: 0354-9836‚ 12 (2008)‚ 2‚ 159-169 DOI: 10.2298/TSCI0802159K Biodiesel‚ a promising substitute as an alternative fuel has gained significant attention due to the finite nature of fossil energy sources and does not
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ENERGY SYSTEMS Figure 1 shows a sprint cycle race. This activity involves cycling four laps of a 250 metre track‚ with the final lap being completed as fast as possible. Elite performers cover the final lap in times of between 10 and 11 seconds. (a) Name the main energy system being used in the final sprint to the finishing line and explain how this system provides energy for the working muscles. (4 marks) (b) At the end of the race‚ the cyclist will be out of breath and will continue to breathe
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Diets have been around since the dawn of time‚ people have always been concerned with their figure. The desired figure may have changed but the method to achieving them were always through altering their diet. FAD diets began in the 19th century with Arsenic pills which claimed to speed up the metabolism and let people lose weight without changing their diet. Despite the fact that this pill ended up doing more harm than good. The diet I’ve chosen for my report didn’t come into existence until late
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How does Glucoregulation work? - Glucagon When blood glucose levels fall below 5mM‚ the alpha pancreatic cells detect this change and release the hormone glucagon. When glucagon bonds to the glucagon receptors that are found mainly in the liver‚ it stimulates a response within the organ that causes glycogen to be converted into glucose. For this reason‚ the liver is said to act as the effector in this system. Glycogen is the branched polymer storage molecule of glucose that is stored in the liver
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ChApter 5 Lipids ChApter oBJeCtiVeS Chapter 5 is designed to allow you to: 1. List four classes of lipids (fats) and the role of each in nutritional health. 4. Explain how lipids are digested and absorbed. 2. Distinguish between fatty acids and triglycerides. 5. Name the classes of lipoproteins and classify them according to their functions. 3. Differentiate among saturated‚ monounsaturated‚ and polyunsaturated fatty acids in terms of structure and food sources. 6. List the function of lipids
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electrophoresis‚ 1L of electrode buffer was created by combining 100 ml of 10X electrode buffer with 900 ml of water. 7. The buffer contained the following components: B-mercaptoethanol‚ SDS‚ glycerol‚ and tracking dye. The purpose of the B-mercaptoethanol and SDS was to break the disulfide bonds and denature the proteins. Glycerol provided added density so that each sample could be loaded through tank buffer‚ and the tracking dye was used to infer the general locations of the proteins. 8. After lowering the
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DIGESTION IN THE MOUTH: Food is mechanically cut by incisors and canines‚ chewed by molars and premolars‚ and mixed with saliva by the tongue. The saliva has been produced by salivary glands‚ which pour it into the mouth through salivary ducts. This process of introducing food into the mouth is called ingestion. Chewing breaks food into smaller particles so that chemical digestion can occur faster. This cutting and mixing is called mastication. Moreover‚ food is chemically digested by salivary
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------------------------------------------------- Rancidification pathways[edit] Three pathways for rancidification are recognized.[3] Hydrolytic rancidity[edit] Hydrolytic rancidity occurs when water splits fatty acid chains away from the glycerol backbone in triglycerides (fats). The chemical term is ester hydrolysis. Usually this hydrolysis process goes unnoticed‚ since most fatty acids are odorless and tasteless. A particular problem arises with butter‚ which contains triglycerides with a
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