GCSE Science Digestive Enzymes GCSE Science Digestive Enzymes 3.5 / 5 based on 2 ratings ? BiologyEnzymes and digestionGCSEAQA Created by: Pixie~Flirt (:Created on: 30-11-12 16:40 Fats and Oils Fats and Oils are essential to out diet They are used in the production for storing energy and for heat insulation Lipase is produced in the pancreas The stomach pH is too acidic for it to work Bile is needed to make an emulsion Bile is made in the liver One product of fat digestion is glycerol Fatty acids and glycerol are easily absorbed into the blood stream 1 of 3 Digestive Enzymes Starch molecules are the storage structure used by plants Basically they are long, often branched chains of carbohydrate molecules Glucose a sugar is required be the body to provide energy Starch cannot be easily absorbed into the blood stream because the molecules are too big In the mouth, an enzyme called amylase (salivary amylase) starts the digestion of starch by breaking it down into maltose Maltose molecules are also too big to be effectively absorbed Amylase form the pancreas (pancreatic amylase) mixes with starch in the small intestine to produce more maltase The small intestine produces an enzyme called maltose that breaks down maltase to glucose The glucose molecules are then taken into the blood and transpoted around the body to provide energy 2 of 3 Proteins Proteins are essential in the diet for growth and tissue repair Proteins are large branched molecules (chains of amino acids) found in all types of meat and soya beans Protease are enzymes that digest proteins examples are trypsin and peptidase Proteins are too large to be absorbed into the blood stream Trypsin is produced in the pancreas Trypsin is released into the small intestine and breaks down proteins to form peptides Peptidase is produced by the liver Peptodase breaks down peptides into individual amino acids that are easily absorbed The acids work best at pH acidic 3 of 3
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