A Level Biology – Mechanics of Breathing – Primrose Kitten

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A Level Biology – Mechanics of Breathing

Last updated: 01/04/2021

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Question 1 of 25

1. Question
Which term is NOT used to describe breathing in humans?
- Countercurrent
- Tidal
- Ventilation
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Question 2 of 25

2. Question
Does the diaphragm contract or relax during inhalation?
- Contract
- Relax
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Question 3 of 25

3. Question
What is the total volume of air inhaled and exhaled in the 2 minutes before exercising?
- 12.48d $m^3$
- 115.2d[latex]m^3[/latex]
- 24d $m^3$
- 57.6d $m^3$
Correct

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Question 4 of 25

4. Question
What is the mean total volume of air inhaled and exhaled in 2 minutes after exercising?
- 20.8d $m^3$
- 192d $m^3$
- 10.4d $m^3$
- 96d $m^3$
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Question 5 of 25

5. Question
What is the percentage change in total volume of air inhaled and exhaled in 2 minutes?
- 0.6667
- 1.6667
- -0.6667
- -1.6667
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Question 6 of 25

6. Question
What is tidal volume?
- Volume of air inhaled and exhaled in a normal breath
- The largest volume of air inhaled in a single breath
- Volume of extra air that can be inhaled after a normal breath
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Question 7 of 25

7. Question
What is vital capacity?
- The largest volume of air inhaled & exhaled in a single breath
- Volume of air inhaled and exhaled in a normal breath
- Volume of extra air that can be inhaled after a normal breath
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Question 8 of 25

8. Question
Does the diaphragm move upwards or downwards during inhalation?
- Downwards to increase volume in thorax
- Upwards to increase volume in thorax
- Downwards to decrease volume in thorax
- Upwards to decrease volume in thorax
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Question 9 of 25

9. Question
What effect does increasing the volume of the thorax have on the pressure in the thorax?
- Decreases
- Increases
- Remains the same
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Question 10 of 25

10. Question
Which piece of equipment is used to measure lung volumes?
- Spirometer
- Colorimeter
- Respirometer
- Potometer
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Question 11 of 25

11. Question
Which way do ribs move when exhaling?
- In and down
- Out and up
- In and up
- Out and down
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Question 12 of 25

12. Question
Which way do ribs move when inhaling?
- Out and up
- In and up
- Out and down
- In and down
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Question 13 of 25

13. Question
What is the purpose of soda lime in a spirometer?
- To absorb C $O_2$
- To release C $O_2$
- To release $O_2$
- To absorb $O_2$
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Question 14 of 25

14. Question
What is happening during A?
- Inhaling
- Exhaling
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Question 15 of 25

15. Question
Which term describes B?
- Tidal volume
- Vital capacity
- Inspiratory reserve volume
- Expiratory reserve volume
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Question 16 of 25

16. Question
Which term describes C?
- Vital capacity
- Inspiratory reserve volume
- Expiratory reserve volume
- Tidal volume
Correct

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Question 17 of 25

17. Question
At D what is the diaphragm doing?
- Relaxing and reducing thorax volume
- Contracting and reducing thorax volume
- Contracting and increasing thorax volume
- Relaxing and increasing thorax volume
Correct

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Question 18 of 25

18. Question
True or false at A the pressure in the thorax is lower than air pressure?
- True
- False
Correct

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Question 19 of 25

19. Question
What is the breathing rate shown in this graph?
- 14 min[/latex]{-1}[/latex]
- 7 min[/latex]{-1}[/latex]
- 11 min[/latex]{-1}[/latex]
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Question 20 of 25

20. Question
Where on the graph does it represent when the thorax is at its greatest volume?
- F
- A
- E
- D
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Question 21 of 25

21. Question
What is the rate of oxygen consumption in the experiment?
- 1.2 d $m^3$ min [/latex]{-1}[/latex]
- 0.6 d $m^3$ min [/latex]{-1}[/latex]
- 3.2 d $m^3$ min[/latex]{-1}[/latex]
- 1.6 d $m^3$ min[/latex]{-1}[/latex]
Correct

Incorrect
Question 22 of 25

22. Question
Which of the following describes exhalation?
- external intercostal muscles relax, ribcage moves downwards and inwards, diaphragm relaxes
- internal intercostal muscles relax, ribcage moves downwards and inwards, diaphragm relaxes
- external intercostal muscles relax, ribcage moves downwards and inwards, diaphragm contracts
- internal intercostal muscles relax, ribcage moves downwards and inwards, diaphragm contracts
Correct

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Question 23 of 25

23. Question
True or false exhalation is a passive process because of the elastic properties of the lungs.
- True
- False
Correct

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Question 24 of 25

24. Question
Which part of the brain controls breathing rate?
- Medulla oblongata
- Hypothalamus
- Cerebellum
- Cerebral cortex
Correct

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Question 25 of 25

25. Question
True or false there is always some air remaining in the lungs after maximum expiration?
- True
- False
Correct

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