CIE iGCSE Co-Ordinated Science B7.2 Digestive system Exam Style Questions Paper 4
Question
Fig. 1.1 is a diagram of the alimentary canal and associated organs in humans.
(a) State the letter that identifies a part in Fig. 1.1:
that contains villi ……………………………..
that produces bile ……………………………..
that produces insulin ……………………………..
where mechanical digestion occurs. ……………………………..
(b) Identify the name of the enzyme secreted by part B in Fig. 1.1 and describe its function.
(c) Teeth are involved in the process of digestion.
State the names of two different types of teeth.
(d) Outline the different roles of bile in digestion.
▶️Answer/Explanation
Ans : 1(a) F ;
H ;
D ;
A and / or C ;
1(b) (salivary) amylase ;
breaks down, starch / carbohydrates ;
to, (simpler) sugar(s) ;
1(c) any two from:
incisor ;
canine ;
pre-molar ;
molar ;
1(d) any four from:
neutralises, (stomach) acid / gastric juice ;
to provide suitable pH (for enzymes) ;
emulsifies fats ;
to provide a larger surface area (for chemical digestion) ;
to increase the rate of digestion ;