Name:
Practice – Chemical Breakdown
The flow chart below shows the process of the digestion of carbohydrates, proteins, and fats in the order of
the gastrointestinal tract. Identify each
and
(16 pts.)
Enzyme
reactant/product
Nutrients
Carbohydrates
Proteins
Lipids
10% Polysaccharides
Polypeptides
Triglycerides
Mouth
Salivary Glands
Stomach
Liver
Gallbladder
G:
Triglycerides
Pancreas
Small Intestine
Note that chemical digestion does not take place in the accessory organs; they only produce the enzymes and/or chemicals that are
needed to break down food molecules.
1. What is the function of G? (1)
2. What hormone stimulates the secretion of G? (1)
3. Would you categorize the reaction involving G as a chemical or mechanical breakdown? Explain (1)
4. What hormone stimulates the secretion of bicarbonate? (1)
5. Two accessory organs secrete bicarbonate. Name the two organs. (1)
6. Other than the two accessory organs, one digestive organ also secrets bicarbonate, but for a different
reason. Name the organ and explain the different reason. (1)
Free Response.
1. What are the two general terms used to name protein-digesting enzyme? (2)
2. What is a micelle? (1)