6.1 Digestion and Absorption

6.1 Digestion and Absorption

1. NATURE OF SCIENCE

   • Use models as representations of the real world
     • Dialysis tubing

2. Digestion

   • Mechanical digestion
     • Peristalsis
   • Chemical digestion
     • Polymers to monomers
       • Pancreas
         • Amylase
           • Production of sugars from starch
           • Brewing of beer
         • Lipase
         • Endopeptidase
   • Cellulose undigested

3. Absorption

   • Villi
     • Increase the surface area of epithelium over which absorption is carried out
     • Villi absorb monomers formed by digestion as well as mineral ions and vitamin
     • Different methods of membrane transport are required to absorb different nutrients

4. Annotate a diagram of the digestive system

5. Micrograph in transverse sections of the small intestine

   • Tissue layers
     • Muscles
       • Longitudinal
       • Circular
     • Mucosa
     • Epithelium