Describe the changes in pupil size when light is shined into the eye. Explain why this happens.

The pupil constricts (becomes smaller) to decrease the light entering the eye. This prevents damage to the eye.

MK
Answered by Melissa K. Biology tutor

2796 Views

See similar Biology GCSE tutors

Related Biology GCSE answers

All answers ▸

Explain the effect of temperature and pH on enzyme-catalysed reactions:


Describe the difference between the function of a receptor and the function of an effector.


Suggest what happens in heart muscle cells when the coronary artery gets blocked.


How is information passed across a synapse?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning