digestion

• A catalyst is a substance that increases the rate of a chemical reaction without being used up in the reaction
• An enzyme is a protein that catalyses chemical reactions.
• When you increase the temperature of an enzyme the rate of reaction increases.

  If the temperature becomes too hot the bonds can break, changing the shape of the active site, causing the enzyme to become denatured.
• • Carbohydrases convert carbs into simple sugars
  • Amylase is a carbohydrase and it is made in…
  • Salivary Glands
  • Pancreas
  • Small Intestine
• Proteases convert proteins into amino acids.

  Proteases are made in …

  • The stomach (Pepsin)
  • The pancreas
  • The small intestine
• Lipases convert lipids into glycerol and fatty acids

  Lipases are made in

  • The pancreas
  • The small intestine
• Our body uses the products of digestion to make carbohydrates, proteins and lipids

  Some glucose that is made is used in respiration.
• Bile is an alkaline that emulsifies fats

  Its produced in the liver and stored in the gall bladder until it’s released into the small intestine .
• Bile neutralises the HCL in the stomach which is too acidic for enzymes in the small intestine to work effectively. This is because bile is an alkaline.
• Enzymes are more effective in alkaline conditions .
• Bile emulsifies fats.

  This means that it breaks the fats into tiny droplets, giving a bigger surface area of fat for the lipase to work on.

  This speeds up digestion