A-Level Biology (Edexcel B)

557 videos | 76 hours

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Topic 9: Control Systems Detection of light by mammals

Photoreceptors Exam Question

5:15 Understand the role of the rhodopsin in initiating action potentials.
Spec 9.7 ii