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- 1. Multiple Choice
With an increase of surface area to volume ratio, what happens to rate of gas exchange?
the rate of gas exchange increases
gas exchange decreases
fish breathe faster
diffusion of oxygen decreases
- 2. Multiple Choice
When particles move from area of high concentration to area of low concentration, this is...
osmosis
diffusion
concentration gradient
- 3. Multiple ChoiceWhat is the function of gills in fish?absorbing carbon dioxideassisting in food digestionprotecting a fish's lungstaking in dissolved oxygen
- 4. Multiple ChoiceTrue of False?
The gill cover is called the Operculum.TrueFalse - 5. Multiple Choice
What is the percentage dissolved oxygen in water?
1%
5%
10%
20%
- 6. Multiple Choice
Which gas exchange method is most efficient?
Parallel flow
Counter-current flow
- 7. Multiple Choice
Which structures increase the surface areas of the gills in fish? (select two)
Gill filaments
Lamellae
Gill arch
Operculum
- 8. Multiple Choicethe evolution of lamellae helpedincrease surface areadecrease surface area
- 9. Multiple Choice
What adaptations does the alveoli have for efficient gas exchange?
thick walls
thin walls
small surface area
- 10. Multiple Choice
The diagram shows the structure of the human gas exchange system. Name organ P.
alveolus
trachea
bronchus
diaphragm
- 11. Multiple Choice
The diagram shows the structure of the human gas exchange system. Name organ Q.
alveolus
trachea
bronchus
diaphragm
- 12. Multiple Choice
In this word equation for respiration, what is y representing?
Glucose + x --> y + water + energy
carbon dioxide
methane
oxygen
ATP
- 13. Multiple Choice
Name the structure that protects fish gills from damage.
filaments
lamellae
operculum
gill arch
- 14. Multiple Choice
How does an increase in lung volume lead to air entering the lungs?
Produces higher pressure
Produces lower pressure
- 15. Multiple Choice
What is meant by a counter-current system?
A short distance for gases to diffuse
When water flows in an opposite direction to blood flow
having a higher concentration inside the lungs than outside
- 16. Multiple Choice
Which one of the following is true for gas exchange?
the movement of lungs.
the exchange of oxygen and carbon dioxide in lungs
the release of energy in cells
- 17. Multiple Choice
Which organ in the fish help them with gas exchange?
lungs
stomata
gills
- 18. Multiple ChoiceFish obtain dissolved oxygen from?AirWater
- 19. Multiple ChoiceGill surface areas are?LargeSmall
- 20. Multiple Choice
How are the gill lamellae adapted for efficient exchange?
They have a good blood supply, lots of capillaries
They are one cell thick, so a short distance for diffusion
There are lots of them, so there is a large surface area
All of the above
- 21. Multiple Choice
What is the advantage of countercurrent flow?
maintains a steep concentration gradient along the length of the diffusion pathway
reduces the concentration gradient along the length of the diffusion pathway
slows down the rate of diffusion
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