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