digestion key points

• Amylase

  • Substrate: Starch
  • Product: glucose
  • pH of solution after reaction: neutral
• Protease

  • Substrate: protein
  • Product: amino acids
  • pH of solution after reaction: acid
• Lipase

  • Substrate: fat (lipid)
  • Product: fatty acids and glycerol
  • pH of solution after reaction: acid
• Ileum

  Site of absorption
• Absorption in the ileum

  Small soluble products of digestion cross the ileum wall and enter blood capillaries by diffusion
• Ileum adaptations

  Ensure products of digestion are absorbed quickly
• Digestion

  Break down of large insoluble molecules to small soluble molecules that can be absorbed into the blood
• plants store carbohydrates as

  starch
• plants store carbohydrates as

  glycogen