Ventilation in Insects and Fish

What is the primary method of ventilation in insects?

• Lungs

• Tracheal system

• Gills

• Skin diffusion

How do fish primarily ventilate their gills?

• By opening and closing their mouths

• By using a diaphragm

• By moving their fins

• By swimming backwards

What is the role of spiracles in insect ventilation?

• To pump blood

• To allow air to enter the tracheal system

• To filter food particles

• To secrete enzymes

Which structure in fish is responsible for extracting oxygen from water?

• Lungs

• Trachea

• Gills

• Skin

In insects, what is the function of the tracheoles?

• To transport blood

• To conduct nerve impulses

• To deliver oxygen directly to cells

• To store nutrients

What is the counter-current exchange system in fish?

• A method to increase water temperature

• A system to maximise oxygen absorption

• A way to expel carbon dioxide

• A process to digest food

What is the primary gas exchange surface in fish?

• Skin

• Gills

• Lungs

• Trachea

What is the main function of the operculum in fish?

• To protect the gills

• To aid in digestion

• To sense vibrations

• To attract mates

How do insects prevent water loss through spiracles?

• By closing spiracles when not in use

• By secreting mucus

• By increasing body temperature

• By reducing metabolic rate

What is the role of lamellae in fish gills?

• To filter food particles

• To increase surface area for gas exchange

• To store oxygen

• To produce sound