Enzymes and digestion

• Starch,protein and fats are big molecules- too big to pass through the walls Of the digestive system so digestive enzymes break them down into smaller molecules like sugar
• Sugar, amino acids, glycerol and fatty acids = smaller molecules can easily be absorbed into bloody stream
• Carbohydrases convert carbohydrates into simple sugars

  Amylase(carbohydrase) and it breaks down starch

  amy lass is made in 3 places:

  1. the salivary glands
  2. the pancreas
  3. the small intestine
• Protease convert proteins into amino acids

  Protease are made in 3 places:

  1. the stomach
  2. the pancreas
  3. the small intestine
• lipases convert lipids into glycerol and fatty acids 


  Made in 2 places:

  1. the pancreas
  2. the small intestine
• The body makes good use of the products of digestive and can be used to make new proteins lipids. and some glucose is used in respiration
• Bile neutralises the stimach acid and emulsifies fats:

  1. bile produced in the liver. stored in the hall bladder before it’s released into the small intestine
  2. hydrochloric acid in the stomach makes the PH too acidic for enzymes in the small intestine to work properly. bile = alkaline so it neutralises the acid. enzymes in small intestine work best in these alkaline conditions
  3. emulsifies fat this gives a much bigger surface area of fat for the enzymes lipase to work on- makes digestion faster