Digestive enzymes

• Why do biological molecules need to digested

  Most of them are too big to be absorbed by our villi and into our body
• What biological molecule is needed to break down large food molecules

  Enzymes
• What is the main carbohydrate we eat

  Starch
• Starch

  Polymer of glucose made by plants
• What enzyme breaks down starch

  Amylase into maltose molecules
• What organ produces amylase

  Salivary glands

  Pancreas

  Small intestines
• What breaks down maltose

  Maltase into two glucose molecules
• Protein

  Polymer of amino acids
• What breaks down proteins

  Group of enzymes called proteases, for example trypsin and pepsin
• What are proteins broken down into

  Amino acids
• Which organs produce protease enzymes

  Stomach

  Pancreas

  Small intestine
• Which enzyme breaks down lipids

  Lipase enzymes
• What are lipids broken down into

  Glycerol and fatty acids
• Which organs produce lipase enzymes

  Small intestines

  Pancreas
• What is bile and how does it help with liquid digestion

  Liquid released from the gall bladder

  Emulsifies lipids increasing the surface area for lipase enzymes to break them down