12.3-4

Question 1

Name the enzyme and chemical reaction in the mouth cavity.

Answer 1

Amylase. It saved in saliva in salivary glands, broke down complex starch into simpler sugar.

Question 2

Shape of crown of incisor

Answer 2

Flat and sharp edge.

Question 3

Shape of crown of canine.

Answer 3

Pointed and curved.

Question 4

Shape of premolar and molar.

Answer 4

Broad(er) top w (more) cusps.

Question 5

Function of incisor

Answer 5

Biting and cutting food.

Question 6

Function of canine

Answer 6

Tearing food

Question 7

Function of premolar and molar.

Answer 7

Grinding food

Question 8

The structure of a tooth

Answer 8

(R)enamel, dentine, pulp cavity, periodontal membrane, cementum. (L)Crown, neck, gum, root, jawbone