BRAINCAKEDigestion
Revision notes for Digestion in AQA Biology (7401). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- DigestionDigestion is the process that breaks down large insoluble food compounds such as carbohydrates, lipids and proteins into small water-soluble…
- The Digestive SystemThe digestive system is a long muscular tube into which glands secrete hydrolytic enzymes, chemicals to maintain the pH for the enzymes to work such…
- Carbohydrate DigestionWhen food enters the mouth it is chewed and mixed with saliva.
- Lipid DigestionSince lipids are hydrophobic molecules, they need to be mechanically broken down into smaller particles and mixed with enzymes so that the…
- Protein DigestionHydrolysis is the breaking of a covalent bond by the addition of a water molecule.
- Structure of the IleumThe walls of the ileum are folded with finger-like projections called villi.
- Absorption of Amino AcidsAbsorption of digested food occurs in the ileum of the small intestine.
- Absorption of MonosaccharidesOn the membrane of the epithelial cell adjacent to the blood the sodium-potassium pump removes sodium from the epithelial cell lowering its…
- Absorption of TriglyceridesChylomicrons move into the lacteals and join the lymphatic system.
- Absorption of Fatty AcidsBile salts emulsify fats.
On the specification
- 3.3.3 Digestion and absorption