1. 6.1 Digestion

3. Starch digestion in the small intestine
Illustrates many processes that we have learned about
Membrane permeability
Catalysis
Without a catalyst the reactions to digest starch would happen at very slow rates
Enzyme specificity

4. Starch digestion in the small intestine
Illustrates many processes that we have learned about
Membrane permeability
Catalysis
Enzyme specificity
Three enzymes in villi membranes break the 1,6 bonds and the 1,4 products; dextrinase, maltase, glucosidase
Salivary amylase begins the digestion.
Most starch digestion happens in the small intestine with enzyme secretions from the pancreas.
1,4 bonds broken by pancreatic amylase
These small sections are now broken down into maltose and maltotriose
Glucose

5. Starch digestion in the small intestine
Illustrates many processes that we have learned about
Membrane permeability
Catalysis
Glucose is absorbed via:
co-transport with sodium ions
into the interstitial fluid via facilitated diffusion
through large membrane pores into capillaries.
Enzyme specificity

9. 6.1.4 Draw and label a diagram of the digestive system. mouth
esophagus
stomach
liver
gall bladder
pancreas
small intestine
large intestine
rectum
anus
Draw the Core

11. How do these properties mimic the wall of the small intestine?
Dialysis tubing made from cellulose has pores in it that allow water and small molecules and ions to pass through freely, but not large molecules.
How do these properties mimic the wall of the small intestine?
What types of membrane transport can be modelled using dialysis tubing and what parts can’t?
10 mL of 1% starch solution
1 mL of water
10 mL of 1% starch solution
1 mL of 1% amylase solution
Bags made of dialysis tubing
Bags made of dialysis tubing
Water
Water

12. Predict whether the bag will gain or lose mass during the experiment.
Cola drinks contain a mixture of substances with different particle sizes. This cola contains glucose, phosphoric acid, and caramel (a complex carbohydrate added to produce a brown color).
Predict which substances will diffuse out of the bag, with reasons for your prediction.
Predict whether the bag will gain or lose mass during the experiment.
Cola, left to go flat before being put in a tube
Bags made of dialysis tubing
Water