FATS (LIPIDS)

• • Lipid molecules consist of a molecule of glycerol attached to three molecules of fatty acids
• • Lipid molecules digested by the enzyme lipase, this produces glycerol and fatty acids
• • Lipase found in the pancreatic fluid and small intestine
• • Bile is made in the liver and stored in the gall bladder
• • Bile helps speed up digestion of lipids but bile is not an enzyme
• • Bile converts large lipid droplets into smaller droplets
• Bile emulsifies the lipid


  This massively increases the surface area of the lipid droplets

  This increases the rate of lipid breakdown by lipase
• • Bile is also an alkaline. This allows it to neutralise the stomach acid, creating alkaline conditions in the small intestine
  • This increases the rate of lipid digestion by lipase