Digestive system

• what organs are the digestive system made up of

  • glands (salivary and pancreas)
  • stomach
  • small intestine
  • liver
  • large intestine
• what are enzymes

  biological catalysts
• what is the lock and key hypothesis

  shape of substrate fits into the active site so the enzyme can perform its function
• what optimum condition do enzymes require

  • pH 7
  • 37 degrees celcius
• what happens if enzymes are not kept at optimum conditions

  they denature
• what are carbohydrases

  convert carbohydrates into simple sugars
• what are proteases

  coverts proteins into amino acids
• what are lipases

  convert lipids into fatty acids and glycerol
• process of digestion

  • teeth break down food
  • digested food is moved through the oesophagus to the stomach and small are large intestines by muscles
  • intestines have lots of tiny folds which create a large surface area for absorbing nutrients and water