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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
Name the three parts of a gill.
filament, lamellae, gill arch
filament, lamellae, operculum
surface area, filaments, gill
- 3. Multiple Choice
When particles move from area of high concentration to area of low concentration, this is...
osmosis
diffusion
concentration gradient
- 4. Multiple ChoiceWhat is the function of gills in fish?absorbing carbon dioxideassisting in food digestionprotecting a fish's lungstaking in dissolved oxygen
- 5. Multiple ChoiceTrue of False?
The gill cover is called the Operculum.TrueFalse - 6. Multiple ChoiceTrue or False?
During inspiration the fish mouth is open and during expiration the fish mouth is closed.TrueFalse - 7. Multiple Choice
What is the percentage dissolved oxygen in water?
1%
5%
10%
20%
- 8. Multiple Choice
To overcome the low percentage of dissolved oxygen in water, bony fish have two major adaptations. These include?
Ventilation of the gills and unidirectional supply of water
Unidirectional supply of water and counter-current exchange of gases
Ventilation of the gills and counter-current exchange of gases.
- 9. Multiple Choice
Which gas exchange method is most efficient?
Parallel flow
Counter-current flow
- 10. Multiple Choice
Which type of gas exchange is carried out by cartilagenous fish?
Parallel flow
Counter-current flow
- 11. Multiple Choice
Which of the following gives the steps of inspiration in the correct order?
mouth opens, operculum opens, buccal floor lowers, volume of buccal cavity increases & pressure decreases, water flows into mouth
mouth opens, operculum closes, buccal floor lowers, volume of buccal cavity decreases & pressure increases, water flows into mouth
mouth opens, operculum closes, buccal floor lowers, volume of buccal cavity increases & pressure decreases, water flows into mouth
mouth opens, operculum closes, buccal floor lowers, volume of buccal cavity increases & pressure decreases, water flows across gills
- 12. Multiple Choice
How and why do most sharks constantly swim?
Mouth open, to drink water.
Mouth closed, to swim faster.
Mouth closed, to force water across their gills.
Mouth open, to force water across their gills.
- 13. Multiple Choice
Which structures increase the surface areas of the gills in fish? (select two)
Gill filaments
Lamellae
Gill arch
Operculum
- 14. Multiple Choice
How can some fish maintain a steep diffusion gradient across the entire gill lamellae?
Counter-current flow
Concurrent flow
Parallel flow
Unidirectional flow
- 15. Multiple Choice
What percentage of oxygen can bony fish absorb from the water?
50%
60%
70%
80%
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