Back to quiz

6. Transpiration works due to:

  • All of the above
  • The xylem vessels
  • Adhesion and cohesion
  • The opening and closing of the stomatal pores
  • Minature gnomes

7. The Xylem vessels are:

  • Dead cells which have no cytoplasm or nuclei
  • Alive cells which transport sugars

8. Cartilaginous fish have a parallel flow system, which is relatively efficient.

  • False
  • True

9. The function of ventilation mechansims is to increase airflow and to allow the efficient exchange of gases.

  • True
  • False

10. In a locust, during inspiration:

  • Spiracles 1, 2 and 10 open, and spiracle 4 closes
  • Spiracles 1, 4 and 10 open, while spiracle 2 closes
  • Spiracles 1, 2 and 4 open
  • Spiracle 10 opens
  • Spiracles 1, 2 and 4 close, and 10 opens.

11. What is a requirement of gas exchange surfaces?

  • To have a constant blood supply (to maintain a concentration gradient)
  • To have a suffiently large surface area to volume ratio
  • To be thin and moist
  • All of the above
  • To be permeable