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6. Where do the entrance holes take the air to in an insect?

  • trachea and then into tracheoles
  • the lungs
  • the alveoli
  • the aleoli

7. Why does water trvel through the gills of a fish?

  • because this is where respiration takes place
  • to maintain a current of water over them
  • to prevent the fish from suffocating

8. What is an adaptation insects have to prevent valuable water from escaping through the entrance holes?

  • The holes are on the upper half of the body to prevent water tipping out
  • They have no adaptations as there is no water loss
  • The holes can be opened and closed using tiny valves
  • The holes are very small to reduce water loss

9. why are there rigid rings in the trachea on an insect?

  • to replace the absent cell wall
  • to keep air passages open
  • to keep cells rigid

10. Why does having an exoskeleton make it difficult for gas exchange?

  • Due to their being no absorption through the exoskeleton
  • As it has a waxy surface making it waterproof which makes it difficult
  • Because there is no structure holding the gas exchange system together

11. What does the surface of a lamellae look like?

  • a single layer of flattened cells
  • an arch
  • an inverted dome
  • a phospholipid bilayer

12. What system is in place in the fish in order to maintain a diffusion gradient?

  • inhalation maintenance system
  • counter-current system
  • pulmonary ventilation system

13. From there, where does the water go in a fish

  • out of the operculum
  • through the gills
  • down the oesophagus

14. Bony fish have gill arches, where are these located?

  • by either side of their head
  • just below their fins
  • on their abdomen

15. what directions do the water and blood flow in a fish

  • blood moves to the right, water moves to the left
  • in opposite directions
  • blood moves to the left, water moves to the right

16. How do larger insects take in more oxygen on top of this?

  • squeezing their abdominal segments together, pumping air into the sacs
  • by flying faster so air travels in quicker
  • having a higher affinity of haemoglobin

17. Where these entrance holes located on the insects body

  • All over the body
  • Along the side of their body
  • In their mouth
  • By their rectum

18. What is the benefit of narrower tracheoles? (insect)

  • Shorter diffusion distance to each cell
  • larger surface area
  • larger surface area to volume ratio

19. Where do tracheoles travel to in an insect?

  • to the lungs
  • to the brain
  • between cells and into muscle fibres, where respiration takes place
  • to the cells which complete respiration independently

20. What is located on the bony gill arches of a fish?

  • lamellae
  • filaments
  • more, smaller gills
  • the operculum