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B2-3.3 enzymes in digestion

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B2-3.3 enzymes in digestion

  1. 1. Enzymes in digestion WALT: To understand the role of enzymes in the digestive system. Sunday, 28 September 2014 WILF: Identify the main parts of the digestive system and state the function of digestion. (C) Describe the location and action of enzymes that breakdown carbohydrates, fats and lipids.. (B) Explain digestion in relation to the molecules involved. (A/A*) Keywords Carbohydrases Proteases Lipases Amylase Amino acids Lipids Fatty acids Glycerol
  2. 2. What do we know about enzymes so far?! Starter Complete the questions on your work sheet to summarise what you’ve learnt about enzymes so far.
  3. 3. List as many organs as you can think of that are involved in the digestive system. From this… To this…
  4. 4. The Digestive Mouth System Liver Oesophagus (Gullet) Stomach Pancreas Large intestine Gall bladder Small intestine Anus
  5. 5. The digestive system The alimentary canal (a muscular tube) along with a range of organs and glands make up the digestive system. Function? To break down large insoluble molecules of food into smaller soluble ones, digestion. e.g. carbohydrate  glucose Peristalsis
  6. 6. Enzymes and the digestive system Digestive enzymes: ~ work outside of your cells ~ produced by glands ~ pass into the gut and break down, catalyses, LARGE INSOLUBLE MOLECULES into smaller soluble molecules
  7. 7. Carbohydrates Broken down into  sugars Enzyme  carbohydrase Proteins Broken down into  amino acids Enzyme  protease Lipids (fats and oils) Broken down into  fatty acids and glycerol Enzyme  lipase
  8. 8. B1 Link! Diet and exercise (1.1) Keywords Malnourished Metabolic rate Inherited C: List the components of a balanced diet and define the term malnourished . B: Describe how the amount of energy you need to live depends on different factors. A/A*: Explain what the term metabolic rate means and factors which can affect it. Pgs. 24-25
  9. 9. Task 1: Complete Qu 1. from the summary box on pg 169. Task 2: Explain how digestive enzymes are different to other enzymes in the body. Task 3: Glue in and complete the table showing the function of the different digestive enzymes in the body. Large molecule Smallmolecule Enzyme Where is it produced? Carbohydrates Proteins Lipids
  10. 10. Investigating digestion Test for starch? Use iodine, a positive result is shown as blue-black colour. Test for sugar (glucose)? Use Benedict’s, a positive result is shown as red colour.
  11. 11. Odd One Out! Spot the odd one out in these lists and give a reason for your answer. There may be more than one answer! 1. Carbohydrases, proteases, glucose 2. Lipids, proteins, amino acids
  12. 12. Large molecule Smallmolecule Enzyme Where is it produced? Carbohydrates Proteins Lipids Large molecule Smallmolecule Enzyme Where is it produced? Carbohydrates Proteins Lipids

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