Digestive System Digestion is the mechanical and chemical breakdown of food into smaller components that are more easily absorbed into a blood stream‚ for instance. Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones. When food enters the mouth‚ digestion of the food starts by the action of mastication‚ a form of mechanical digestion‚ and the wetting contact of saliva. Saliva‚ a liquid secreted by the salivary glands‚ contains salivary amylase‚ an enzyme
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Enzymatic reaction is known as digestion and this is defined as the chemical breakdown of the ingested complex food molecules by the action of biological enzymes‚ into simplest form that can be absorbed into the blood stream and assimilated into living cells. In human beings‚ various components of the ingested food are digested and absorbed at various sections of the alimentary canal . The first digestion process starts at the mouth in which cooked starch is reduced into simpler sugars by
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Compound Color Reducing Sugar (yes/no) Water Blue No Glucose Red Yes Fructose Reddish-Orange Yes Sucrose Blue No Lactose Red Yes Maltose Red Yes Starch Blue No Glycogen Blue No C. BARFOED’S TEST FOR MONOSACCHARIDES Compound Color Monosaccharides (yes/no) Water Blue No Glucose Red Yes Fructose Red Yes Sucrose Blue No Lactose Blue No Maltose Blue No Starch Blue No Glycogen Blue No D. SELIWANOFF’S TEST FOR KETOHEXOSES Compound Color Ketohexoses/Aldohexoses Water Light-Orange Aldohexoses Glucose Light-Orange
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FOOD AND NUTRITION & The Digestive System Lecture No. 10 FOOD AND NUTRITION Food Food is any edible material that supports growth‚ repair and maintenance of the body. Foods are substances containing nutrients Nutrients are needed for: • Cell repair • Cell growth • Energy • Protection Food Classification of foods: A. According to the source of origin 1. Animal foods 2. Plant foods B. According to the calorigenicity 1. Calorigenic foods 2. Non-Calorigenic foods C. According to the main
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B‚ D‚ D‚ B‚ B‚ C‚ C‚ B‚ C‚ C‚ C‚ C‚ C‚ A‚ D‚ B‚ C‚ A‚ D Amylase -drawing- Hydrolysis i) Digestion ii) Absorption 1. Reduces cholesterol level in the blood 2. Does not cause coronary heart disease It cannot be digested E i) 2 hours ii) stomach It has an acid resistant coat‚ hence the acid in the stomach will not be able to dissolve its coat and the drug will not be released. It also has a permeable coat which tends to stick to the mucus‚ hence it will move down the alimentary
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Introduction The Digestive system breaks down the ingested food into absorbable forms of nutrients and absorbs nutrients‚ ions and water from the external environment of the body. It is designed to maximize digestion and absorption. The functional structures of the digestive system are the passage‚ the glands like salivary glands‚ gastric glands‚ pancreatic‚ intestinal glands and liver. Also‚ the four layers of the digestive system are mucosa‚ submucosa‚ muscularis and serosa. The digestive system
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Polymers are insoluble and therefore cannot be absorbed into our bloodstream and need to be assimilated into different absorptive products. Polymers have to be hydrolysed into smaller‚ soluble molecules. This process happens during the process of digestion. Food is broken down by mechanical or chemical means (Hydrolysis) and this process is aided by Enzymes. Enzymes are biological‚ process catalysing Proteins which massively speed up the breaking down of compound molecules into micromolecules to allow
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combination of organs which have been arranged together to help carry out its particular function of turning food into the energy which is necessary to survive and packaging the excess residue for waste disposal. Digestion involves the breakdown of food into smaller components. The process of digestion has many stages with the first starting in the oral cavity. Within the system‚ food passes through a tube called the alimentary canal‚ more commonly known as the gastrointestinal tract. The tract is made up
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similar to glucose but it is found only in fruits & honey. GA lactose * Does not occur naturally in foods‚ but it forms as a result of the digestion of the disaccharide. Disaccharides Are formed through the combination of any 2 monosaccharides. * Glucose +fructosesucrose * Glucose+ GA lactose lactose * Glucose +Glucosemaltose Starch * It acts as a store of energy which can be converted back into glucose when required. It can be found in 2 forms: * The polysaccharides
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the food we eat and breaking it down to obtain vital nutrients that will allow us to live and be healthy is digestion. According to "Wikipedia.com" (2013)‚ “Digestion is a form of catabolism: a breakdown of large food molecules to smaller ones‚ it is the mechanical and chemical breakdown of food into smaller components that are more easily absorbed into a blood stream” (Digestion). Digestion time varies between individuals and between men and women. After you eat‚ it takes about six to eight hours
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