Gas Exchange and Respiration in Fishes Quiz

What is the primary respiratory organ in fish?

• Lungs

• Gills

• Skin

• Trachea

What is the function of gill lamellae in fish?

• To prevent collapse of gills

• To increase surface area for gas exchange

• To store oxygen

• To regulate water flow

Which mechanism allows for effective removal of oxygen from water in fish gills?

• Co-current flow

• Cross-current flow

• Parallel flow

• Counter-current flow

What is the function of pillar cells in teleost gills?

• To produce mucus for gill protection

• To regulate oxygen levels

• To maintain gill structure

• To separate blood from water

How do fast-moving fish like tuna obtain oxygen efficiently?

• By resting on the ocean floor

• By using ram ventilation

• By absorbing oxygen through their skin

• By breathing air from the surface

What is the main function of hemoglobin in fish blood?

• To transport carbon dioxide

• To increase oxygen-carrying capacity

• To remove toxins

• To regulate blood pressure

Which fish respiratory strategy involves coordinated movements of buccal and opercular cavities?

• Cross-current flow

• Counter-current flow

• Ram ventilation

• Double pump system

What is the purpose of the operculum in fish gills?

• To cover and protect the gills

• To filter water for oxygen extraction

• To store excess oxygen

• To regulate water temperature

What is the main difference between aerobic and anaerobic respiration in fish?

• The presence of oxygen

• The location of gas exchange

• The speed of respiration

• The type of fish species

Why do active fish have more gill area and gill lamellae per mm of gill filament?

• To regulate body temperature

• To increase oxygen intake

• To attract mates

• To conserve energy