Cambridge IGCSE · Biology (0610)

Physical digestion: Practice Questions

5 multiple-choice questions marked as you go, and 5 written questions with worked solutions. All on Physical digestion.

10 questions25 marksFree, no account

Question 1

1 mark

How do the muscular walls of the stomach contribute to physical digestion?

Question 2

1 mark

Which statement best describes the primary structural role of cement in a human tooth?

Question 3

1 mark

If a spherical mass of food is broken down into many much smaller spheres, the total volume remains the same. Which statement correctly identifies the change in the surface area to volume ratio (\( \text{SA:V} \)) and its effect on chemical digestion?

Question 4

1 mark

What is the outermost, hardest layer of a human tooth called?

Question 5

1 mark

Which part of a human tooth contains the living tissue, including the nerves and blood vessels?

Question 6

2 marks

State the name of the hardest tissue that forms the outer layer of a human tooth and describe its specific function during the physical digestion of food.

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Question 7

3 marks

In the context of physical digestion, how do the structural features of human premolars and molars differ to suit their specific functions in the breakdown of food?

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Question 8

5 marks

Explain how the process of physical digestion carried out by bile in the duodenum facilitates a more rapid rate of chemical digestion of lipids.

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Question 9

5 marks

(a) Define physical digestion.
(b) Explain how physical digestion increases the efficiency of chemical digestion, providing an example.
(c) Name the four types of human teeth and briefly describe their specific roles in physical digestion.

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Question 10

5 marks

Physical digestion is essential for preparing food for the action of enzymes.
(a) Describe the mechanical action of the stomach and explain how it assists in the subsequent chemical digestion of proteins.
(b) Explain why the emulsification of fats by bile is classified as physical digestion rather than chemical digestion.
(c) Compare the functions of incisors and molars in the mouth and explain how their shapes are adapted to these specific functions.

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