Gas Exchange in insects and fish

What are the holes in an insect's abdomen called?

• Pores

• Stomata

• Spiracles

• Spindles

As the size of an organism increases its surface area to volume ratio increases

• True

• False

What are the smaller tubes (plural) that branch from the tracheae in insects called?

By which process in oxygen transported into cells?

When would there be more fluid at the end of tracheoles?

• When the muscle is active

• When the muscle is resting

Why is oxygen transported into insect muscle cells faster when they are active?

• There is less fluid in the tracheoles and diffusion is faster in air

• Lactic acid is secreted into tracheoles

• There is more fluid in the tracheoles and diffusion is faster in water

• Oxygen can be transported into cells by osmosis

What helps to draw air into insect tracheae?

• breathing

• abdominal pumping (due to muscle contraction)

• respiration

• gas exchange

What is the surface area to volume ratio of a cube that has sides of 2cm? Express your answer as __:1

What is the exoskeleton of an insect made from?

• cellulose

• peptidoglycan

• chitin

• calcium

Which substance(s) can exit spiracles?

• oxygen

• carbon dioxide

• glucose

• water (vapour)