Cambridge International AS Level · Biology (9700)

Gas exchange: Practice Questions

5 multiple-choice questions marked as you go, and 4 written questions with worked solutions. All on Gas exchange.

9 questions18 marksFree, no account

Question 1

1 mark

In the gas exchange system, what is the specific role of elastic fibres in the walls of the alveoli during expiration?

Question 2

1 mark

What occurs during the process of gas exchange between the air in the alveoli and the blood?

Question 3

1 mark

A student observed a transverse section of a part of the gas exchange system under a light microscope. The section showed a layer of ciliated epithelial cells, goblet cells, and a layer of smooth muscle, but no cartilage.

Which part of the gas exchange system was being observed?

Question 4

1 mark

What is the primary function of smooth muscle in the walls of the bronchi and bronchioles?

Question 5

1 mark

Which of the following conditions must be maintained to ensure the diffusion of oxygen from the alveoli into the blood?

Question 6

2 marks

Describe the function of cartilage in the walls of the trachea and bronchi.

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Question 7

5 marks

Contrast the roles of smooth muscle and elastic fibres in the gas exchange system, specifically explaining their distinct functions during the process of exhalation.

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Question 8

2 marks

State the function of goblet cells and ciliated epithelial cells in the human gas exchange system.

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Question 9

4 marks

The lining of the trachea contains specialized cells that maintain the health of the gas exchange system.
(a) Describe the function of goblet cells.
(b) Explain how ciliated epithelial cells work to remove trapped particles from the airways.

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