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- 1. Multiple Choice
What is the name of two main branches from the trachea (one to each lung)?
bronchi
alveoli
capillaries
bronchioles
- 2. Multiple Choice
What happens when you breathe in? (tick all that apply)
diaphragm relaxes and moves up
diaphragm contracts and flattens
increases volume in thorax
reduces volume in thorax
- 3. Multiple Choice
Which of the following is not happening during inhalation?
the diaphragm contracts
the rib cage rises up
expands the volume of the chest cavity
diaphragm is relaxing
- 4. Multiple Choice
A contraction of the diaphragm during inhalation causes it to flatten. What else does the contraction result in?
An increase in the volume of the thoracic cavity
Increase in alveolar pressure
A decrease in lung volume
A decrease in the volume of the thoracic cavity
- 5. Multiple Choice
What happens when the external intercostals contract during inhalation?
The diaphragm relaxes
The ribs are elevated
Pressure in the lungs increases
The size of the thoracic cavity decreases
- 6. Multiple ChoiceGiven the following structures:
1. larynx
2. nasal cavity
3. pharynx
4. trachea
Which of the following is the correct order that air would flow during inhalation.1,2,3,42,3,1,42,1,3,44,2,3,1 - 7. Multiple Choice
The main function of cilia which line the respiratory surface is to
Moisten the trachea
Lubricate the bronchi to ease the flow of air into the lungs
Move the mucus to the pharynx and away from the lungs
Provide mucus to the lungs to prevent the lungs from dehydration
- 8. Multiple Choice
What happens when you breathe in? (tick all that apply)
diaphragm relaxes and moves up
diaphragm contracts and flattens
increases volume in thorax
reduces volume in thorax
pressure in thorax lower than outside
- 9. Multiple Choice
Tubifex worms are small, thin animals that live in water. They have no specialised gas exchange or circulatory system. Name the process by which oxygen reaches the cells inside the body of a tubifex worm.
active transport
respiration
diffusion
facilitated diffusion
- 10. Multiple Choice
What is tidal volume?
the volume of air inspired per minute
The amount of air left in the lungs after expiration
Volume of air expired per breath at rest
volume of air inspired per breath at rest
- 11. Multiple Choice
Just before a person starts to exhale, the composition of the air in an alveolus differs from the composition of the air in the trachea. How would the composition differ? (tick all that apply)
less oxygen
more oxygen
more carbon dioxide
more water vapour
less water vapour
- 12. Multiple Choice
How does an increase in lung volume lead to air entering the lungs?
Produces higher pressure
Produces lower pressure
- 13. Multiple Choice
What helps oxygen to be absorbed rapidly into the blood in the lungs?
Air breathed in has less oxygen than air breathed out.
Alveoli have thick walls and a large surface area.
Alveoli have thin walls and a large surface area.
The concentration of oxygen in the blood is higher than in the alveoli.
- 14. Multiple Choice
_________ happens during inspiration.
diaphragm relaxes
external intercostal muscle contracts
external intercostal muscle relaxes
rib cage lowered
- 15. Multiple Choice
Also called the throat
larynx
pharynx
trachea
epiglottis
- 16. Multiple Choice
What is the moist sac that lines the lungs?
pleura
surfactant
bronchus
glottis
- 17. Multiple Choice
What is the fatty secretion that helps trap gases and moisten the lung surfaces to help them inflate and deflate?
pleura
surfactant
bronchus
glottis
- 18. Multiple Choice
What change occurs that results in an increase in the breathing rate?
High blood volume
Low blood O2 concentration
High blood CO2 concentration
High blood pH
Low blood pH
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