The graph shows how the pressure and volume inside the lungs change during one complete breath. At which point are the muscles of the diaphragm starting to contract?

5090_s19_qp_11

MCQ

2019

Paper 1, Variant 1

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The graph shows how the pressure and volume inside the lungs change during one complete breath. At which point are the muscles of the diaphragm starting to contract?

5090_s19_qp_12

MCQ

2019

Paper 1, Variant 2

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The diagram shows the human breathing system. Y X The photomicrographs below show further details of the two components labelled X and Y, from the breathing system of a non-smoker seen using a light microscope. A B magnification of X magnification of Y Name the structures labelled A. Describe the role of the structures labelled A. Name the structures labelled B. Describe the changes to the structures labelled B that would be caused by tobacco smoke and explain the possible effects on a smoker of these changes. Outline two reasons why many people regard smoking as socially unacceptable.

5090_s20_qp_22

THEORY

2020

Paper 2, Variant 2

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Why does oxygen enter the blood in the lungs?

5090_s21_qp_11

MCQ

2021

Paper 1, Variant 1

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Describe how air is breathed in, using the rib cage and diaphragm, so that it reaches the alveoli. Bronchitis is a condition that can be triggered by breathing in substances that cause the bronchi to become inflamed and produce a large amount of mucus. Suggest how this condition can affect a person and explain how a person may be able to avoid developing the condition.

5090_s21_qp_21

THEORY

2021

Paper 2, Variant 1

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Which row shows actions that occur when humans breathe in?

5090_s22_qp_11

MCQ

2022

Paper 1, Variant 1

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The diagram shows part of the lining of the human trachea. X What is the function of cell X?

5090_w05_qp_1

MCQ

2005

Paper 1, Variant 0

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The diagram shows the ribs and some of the muscles used in breathing. sternum vertebrae X Y diaphragm external intercostals lung breathing out Which muscles relax in moving from position X to position Y?

5090_w06_qp_1

MCQ

2006

Paper 1, Variant 0

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Which do the cilia do in the bronchi of the lungs?

5090_w07_qp_1

MCQ

2007

Paper 1, Variant 0

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The diagram illustrates changes in air pressure taking place inside the lungs during a complete cycle of breathing. Which position on the graph corresponds to the point at which the ribs are beginning to be raised?

5090_w09_qp_1

MCQ

2009

Paper 1, Variant 0

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