Week 5 Flashcards
1
Q
Photopic system
A
Bright light, come receptors located in fovea, not sensitive/good resolution, detail/color vision
2
Q
How do photoreceptors work
A
Rods are filled with rhodopsin. Light causes chemical reaction in rhodopsin that releases energy which hyper polarizes bipolar cells with rod synapses
3
Q
Bleaching of rhodopsin
A
Retinal+opsin
Particles of light split bond
Channels in cell membrane open(hyper polarize), activated synapsing bipolar cell
Regeneration (unite)
4
Q
Neural connections
A
Ross/cones synapse with bipolar cells which then synapse with ganglion cells. Far more rods to bipolar cone ratio. Rgcs that synapse with rods magno, cones parvo
5
Q
Scotopic system
A
Dim light, rod receptors outside of fovea, sensitive with low resolution, shades of gray
