Visual pathway - Phototransduction - Visual Pigments
3 important questions on Visual pathway - Phototransduction - Visual Pigments
Name the 2 visual pigments families found in the eye?
- Rhodopsin
- Iodopsin
What are 2 similar feature of visual pigments?
List the 4 step pathway involved in the formation and breakdown of rhodopsin
- Pigment synthesis: vitamin a is oxidised to become 11-cis-retinal → bonded with opsin → form rhodopsin
- Pigment bleaching: Light absorption by rhodopsin → rapid series of steps in which retinal changes shape (becomes 11-cis to all trans) released from opsin
- Pigment regeneration: with ATP enzymes convert all-trans-retinal back to 11-cis-retinal at the pigmented layer
The question on the page originate from the summary of the following study material:
- A unique study and practice tool
- Never study anything twice again
- Get the grades you hope for
- 100% sure, 100% understanding

















