LAST DIGESTION & ABSORPTION TARGET

2. Use dialysis tubing to model absorption of digested food in the intestine.

What is the point of digestion? T-P-S an answer to this question, using carbohydrates as a example.

WWK: Dialysis tubing (aka visking tubing)

a type of semi-permeable membrane tubing used in separation techniques that facilitates the removal or exchange of small molecules from macromolecules in solution based on differential diffusion a form of passive membrane transport

Design a method to use dialysis tubing to model absorption of digested food in the intestine.

In a group of 3, create a diagram of your model.

Materials: • 1% starch solution• 1% amylase

solution• Glassware• Dialysis tubing• Glass

thermometers• Biuret’s solution

• Benedict’s reagent• Vernier temp.

probes• Iodine • Water bath kept at

40*C• Tap water• Hot plates - 3• Distilled water