Photoreceptor cells A
What order neuron are photoreceptor cells?
1st order
More responsive to bright light?
Cones
Outermost portion of inner segment containing mitochondria?
Ellipsoid
Axonal process found on cones but can connect rods/cones?
Telodendria
2nd order
What is the function of photoreceptor cells?
Change photon of light into neural signal
What three pigments are in cones? What are their peak absorption wavelengths?
Blue - 420 nm
Green - 531 nm
Red - 588 nm
Innermost portion of inner segment containing golgi apparatus and endoplasmic reticulum?
Myoid
Where does retinal detachment typically occur?
Where interphotoreceptor matrix surrounds outer segment
What is the function of bipolar cells?
Carries signal to ganglion cells
More responsive to dim light?
Rods
What are the six structures of photoreceptor cells?
Outer segment
Cilium
Inner segment
Outer fibers
Cell body
Inner fiber
What is the portion from myoid to cell body?
Where are discs in rod produces and where are they sloughed off?
Produced at base and sloughed off at tip
What do dendrites and axon of bipolar cells synapse with?
Dendrite synapse with: photoreceptors, horizontal cells, interplexiform neuron processes
Axon synapse with: ganglion cells, amacrine cells
What is scotopic vision?
What is photopic vision?
Scotopic: dim light vision
Photopic: bright light vision
How many discs are in the outer segment of rods? How many in cones?
Rods - 600-1,000 discs
Cone - 1,000-1,200 discs
Cell body
What phagocytizes sloughed off discs?
How many types of bipolar cells are there?
11 (1 rod, 10 cones)
What pigment is found in rods?
What is the connection between outer and inner segments?
Cilium
Where do rods and cones terminate?
Rods - spherules
Cones - pedicules
How are cones renewed?
Similar to rods however mechanism is unknown