human digestive system. (Total 4 marks) 3. Describe the role of enzymes in the process of digestion of proteins‚ carbohydrates and lipids in humans. (Total 6 marks) 4. Draw a labelled diagram of the digestive system. (Total 5 marks) 5. State the sources‚ substrate‚ product‚ and optimum pH conditions for the enzyme amylase. (Total 4 marks) 6. Describe the role of enzymes in digestion with reference to two named examples. (Total 5 marks) 7. What sequence of organs do substances
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the gastrointestinal tract plus the accessory organs of digestion (the tongue‚ salivary glands‚ pancreas‚ liver‚ and gallbladder).[1] In this system‚ the process of digestion has many stages‚ the first of which starts in the mouth. Digestion involves the breakdown of food into smaller and smaller components‚ until they can be absorbed and assimilated into the body. Chewing‚ in which food is mixed with saliva begins the process of digestion. This produces a bolus which can be swallowed down the esophagus
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Does the amount of time that orange juice is swished in a human mouth affect the pH of the saliva‚ which could inhibit the digestion of the starches in the orange juice? Hypothesis: The longer 2 mL of orange juice is held in a test subject’s mouth‚ the greater the ability of the test subject’s saliva will become to break down starches. Dependent Variable: pH of the saliva. Independent Variable: time that the juice is swished in the mouth. Controlled Variables: Orange juice only. The
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Lipid Digestion The process of mastication is our only conscious act in the digestion of the foods we consume. After that‚ it’s out of sight‚ out of mind; but should it be? What does it take to transform that last swallow into the energy our body needs to sustain itself? In the case of lipid digestion‚ the real magic occurs throughout the gastrointestinal tract with a synergistic collaboration from the accessory organs: the liver‚ gallbladder and pancreas. Understanding the whole process of digestion
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University of Phoenix Material Human Digestion Worksheet The Digestive System and its Functions Review the diagram located on p. 1. In the space provided below‚ write the name of each organ or part‚ and explain the function of each one as it relates to digestion and absorption. Explanations must be written as complete sentences. Please make sure that you identify each organ or part below with the corresponding number located in the diagram. DIGESTIVE ANATOMY FUNCTION 1 Mouth The mouth
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Department of agriculture- digestive system of a cow‚ koala and dingo Digestion comparison Koala The Koala is the only mammal‚ other than the Greater Glider and Ringtail Possum‚ which can survive on a diet of eucalyptus leaves. Gum leaves contain only about 50% water‚ very little nitrogen‚ large amounts of fibre and potentially toxic oils. Koalas are found to have molars premolars to physically break down the food. Plants contain cellulose‚ which can only be broken down to release cell contents
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Alloy - An alloy is a substance made by melting two or more elements together‚ at least one of them a metal. An Example: Examples of alloys include brass‚ bronze‚ 14k gold‚ and sterling silver. covalent bond - A covalent bond is a chemical link between two atoms in which electrons are shared between them. An Example: There is covalent between the oxygen and each hydrogen in (H 2 O). Each of the bonds contains two electrons - one from a hydrogen atom and one from the oxygen atom. Both atoms
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Checkpoint: Human Digestion SCI/241 June 4‚ 2013 The path that food follows through the digestive system is very interesting. First you put the food to your mouth‚ take a bite‚ and chew. The salivary glands begin the digestive process at the sight and smell of food. After food enters the mouth and is moistened by saliva‚ it transforms into a bolus. Once the bolus leaves the mouth‚ it moves into the pharynx‚ where it can be swallowed. The bolus then moves from the pharynx to the stomach
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consist of large molecules of protein that must be digested by enzymes before they can be used to build and repair body tissues. An enzyme in the juice of the stomach starts the digestion. Further digestion
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Cited: Dijkstra J. 2005: Quantitative Aspects of Ruminant Digestion and Metabolism (2nd Edition). CABI Publishing. Wallingford. Brooker‚ R.J.‚ Widmaier‚ E.P.‚ Graham L.E. & Stiling P.D. 2008: Biology. McGraw-Hill. New York.. Church‚ D. C. ed. 1993. The Ruminant Animal Digestive Physiology and Nutrition. Waveland
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