From retina to cortex
From retina to cortex
Visual information starts in the retina, where photoreceptors convert light into nerve impulses. Signals leave each eye through the optic nerve and head toward the brain.
Step-by-step lessons on Edexcel A A Level Biology Visual development, animal studies and habituation. Each one builds up to exam-style questions. Build a strong foundation in cell biology and biochemistry early on, since later topics on genetics, ecology and physiology all draw on these core concepts.