Page 22 - exemple

Summary of the chemical digestion

Organ of the Digestive juice Enzyme Digested Result of digestion
digestive tract food

Mouth (neutral Saliva Salivary Cooked starch Maltose (incomplete
medium) amylase digestion)

Stomach (acidic Gastric juice Pepsin Proteins Polypeptides (incomplete
medium HCl) digestion)

Trypsin Proteins and Polypeptides and amino
polypeptides acids (incomplete digestion)

Amylase Starch (cooked Maltose (incomplete
Small or raw) digestion)
intestine Intestinal and
pancreatic Maltase Maltose Glucose
(basic juice
medium Bile)
Lipase Lipids Fatty acids and glycerol

Sucrase Sucrose Glucose + fructose

Lactase Lactose Glucose + galactose

Doc 7- Simplified table of the chemical digestion.

Probing of activity 3

1- Name the phenomenon through which the complex molecules are transformed into simple
ones.
2- Analyze the results of document 1.

3- Name the molecules to which the proteins are transformed.
4- Write a short paragraph explaining document 3.
5- Name the place where lipids are digested. Name the products of their digestion.
6- Is bile an enzyme? Justify your answer. What is its role?

7- Interpret document 5.
8- Represent the results of document 6 in the form of a table.
9- List the nutrients found in the small intestine at the end of digestion.

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