O-LevelBiologyCoordination & Response5090/12 · Oct/Nov 2016 · Q231 Mark
A person is sitting in a darkened room. After five seconds, a light is turned on. Five seconds after that, the light is turned off again. Which graph shows the changes in the diameters of their pupils?
This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.
AGraph showing pupil diameter large initially, decreasing at 5 seconds, then increasing back to large at 10 seconds.
BGraph showing pupil diameter small initially, increasing at 5 seconds, then decreasing back to small at 10 seconds.
CGraph showing pupil diameter large initially, decreasing at 5 seconds, then remaining small at 10 seconds.
DGraph showing pupil diameter small initially, increasing at 5 seconds, then remaining large at 10 seconds.
✓ Correct answer
A: Graph showing pupil diameter large initially, decreasing at 5 seconds, then increasing back to large at 10 seconds.
Practise more questions on this topic
Oracle Prep sorts past-paper questions by topic, so you can drill Coordination & Response and see which topics are most likely to come up next.
Sign up free →