2.2 Gas Exchange in Fish

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

Name the three parts of a gill.

• filament, lamellae, gill arch

• filament, lamellae, operculum

• surface area, filaments, gill

When particles move from area of high concentration to area of low concentration, this is...

• osmosis

• diffusion

• concentration gradient

What is the function of gills in fish?

• absorbing carbon dioxide
• assisting in food digestion
• protecting a fish's lungs
• taking in dissolved oxygen

Tags

NGSS.MS-LS2-1

True of False?
The gill cover is called the Operculum.

• True
• False

True or False?
During inspiration the fish mouth is open and during expiration the fish mouth is closed.

• True
• False

What is the percentage dissolved oxygen in water?

• 1%

• 5%

• 10%

• 20%

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.

Which gas exchange method is most efficient?

• Parallel flow

• Counter-current flow

Which type of gas exchange is carried out by cartilagenous fish?

• Parallel flow

• Counter-current flow