lecture 1 intro/lect 2 duplex retina Flashcards
Horizontal cells stretch horizontally and synapse with which type of retinal cell? and in which retinal layer
rods and cones in the outer plexiform layer
Amacrine cells stretch horizontally and synapse with which type(s) of retinal cell? and in which retinal layer
presynaptic connections with bipolar and post-synaptic with bipolar and ganglion cells in the inner plexiform layer
What causes retinol-11-cis to convert to retinal-11-trans?
light
What causes retinol-11-trans to convert to retinal-11-cis?
recoverin
Glutamate in the retina is…
a) excitatory
b) inhibitory
c) both excitatory and inhibitory
d) neither, Glutamate is not a neurotransmitter
c) both
The “duplex retina” refers to what?
dual functioning of light and dark/rod and cone property of the retina.
True or False: Rods are sensitive to bright light and cones are sensitive to dim light
False-its the opposite
true or false: rods are more sensitive to light than cones
true-rods get overstimulated in light and have a large surface area with more discs than cones.
What is the rod/cone threshold in (cd/m2)?
0.03cd/m2–rods detect light below this value, cones detect light above this value
true or false: rods do not function in bright light because they are overstimulated and cones do not function at all in the dark.
true
scotopic vision includes:
a) cone function
b) rod function
c) both cone and rod function
b) scotopic=rods
photopic=cones
mesopic=both rods and cones
moonlit paper is an example of:
a) photopic vision
b) mesopic vision
c) scotopic vision
b)mesopic
starlit paper is an example of:
a) photopic vision
b) mesopic vision
c) scotopic vision
c) scotopic
sunlit paper is an example of:
a) photopic vision
b) mesopic vision
c) scotopic vision
a) photopic
opsins are found in _____ segments of rods and cones, this is also where light is absorbed.
outer,