PSL440Y1 Study Guide - Final Guide: Order Of Newfoundland And Labrador, Ganglion, Telecom Regulatory Authority Of India
Document Summary
Deactivation of the phototransduction cascade occurs at multiple levels: Pigmented epithelium: interlaces with outer segments of the rods where actual transduction cascade happens. What we think of as white light = many different wavelengths/colours all together this is what we can see (cannot see gamma rays, x-rays, radio, etc. ) different photoreceptors, different opsins. Cones are responsible for colour vision: these photoreceptors contains opsins/photopigments that responds to different wavelengths of light, rods only respond to one wavelength of light. Color perception depends on the difference in activity of the red, green and blue cones. Lilac colour chaser: photobleaching: when you get rid of certain colours because they are overstimulated and do not have the chance to regenerate those opsins. Around 5% of the population in north america is dichromaic, rather than trichromaic. Is usually caused by mutation of either red or green photopigment proteins: genes for these proteins are located on the x chromosome.
