Question 1

Where does gas exchange occur in fish?

Accepted Answer

Gills

Answer

Stomach

Answer

Skin

Answer

Lungs

Question 2

What is the role of countercurrent flow in fish gill structure?

Accepted Answer

Maximizes oxygen uptake

Answer

Increases carbon dioxide retention

Answer

Minimizes oxygen uptake

Answer

Aids in food digestion

Question 3

How do fish extract oxygen from water in their environment?

Accepted Answer

Through diffusion across their gills

Answer

By drinking water

Answer

By absorbing oxygen through their skin

Answer

By inhaling through their mouth

Question 4

Which gas is exchanged by fish during respiration?

Accepted Answer

Oxygen

Answer

Carbon dioxide

Answer

Hydrogen

Answer

Nitrogen

Question 5

Which of the following components in fish gills is responsible for the actual exchange of gases?

Accepted Answer

Gill lamellae

Answer

Gill arches

Answer

Operculum

Answer

Pseudobranch

Question 6

What is the main respiratory pigment found in fish that aids in oxygen transport?

Accepted Answer

Hemoglobin

Answer

Chlorophyll

Answer

Keratin

Answer

Melanin

Question 7

What is the specific structure in fish gills that increases the surface area for gas exchange?

Accepted Answer

Lamellae

Answer

Capillary

Answer

Alveolus

Answer

Filament

Question 8

What is the function of the operculum in fish respiration?

Accepted Answer

It protects the gills

Answer

It aids in gas exchange

Answer

It stores excess oxygen

Answer

It filters water for oxygen extraction

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