CAIE IGCSE Biology EXTENDED 14.2.5 Pupil reflex in terms
CAIE IGCSE Biology EXTENDED 14.2.5 Pupil reflex in terms
Practise using circular and radial iris muscles to explain how antagonistic action changes pupil size in different light levels.
How this is tested
- apply circular and radial muscle states to make the pupil smaller or larger
- compare iris muscle contraction and relaxation in bright and dim light
- state antagonistic action for muscle pairs working in opposition in the iris