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25 Cards in this Set
- Front
- Back
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Where is the pigment cell layer?
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Just inside the choroid
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What does the pigment cell layer contain?
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It contrains a pigment which converts trans-rhodopsin to cis-rhodopsin
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Which layer of the retina contains a pigment which converts trans-rhodopsin to cis-rhodopsin?
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The pigment cell layer.
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Which layer contains rods and cones?
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The photoreceptor layer.
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What does the photoreceptor layer contain?
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Rods and cones.
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What does the outer nuclear layer contain?
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photoreceptor nuclei
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Which layer contains photoreceptor nuclei?
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the outer nuclear layer.
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What does the outer plexiform layer contain?
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Synapses between photoreceptors and interneurons.
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Which layer contains synapses between photoreceptors and interneurons?
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the outer plexiform layer
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what is the inner nuclear layer made up of?
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interneuron cells bodies
bipolar cells horizontal cells amacrine cells |
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which layer of the retina contains interneuron cell bodies and amacrine cells?
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the inner nuclear layer.
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What is in the inner plexiform layer?
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Synapses between interneurons and ganglion cells.
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Which retinal layer contains synapses between interneurons and ganglion cells?
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the inner plexiform layer.
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What is in the ganglion cell layer?
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Ganglion cell bodies.
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Which layer has ganglion cell bodies?
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the ganglion cell layer.
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What is in the optic nerve layer?
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Ganglion cell axons leaving the optic nerve.
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Which layer contains ganglion cell axons leaving the optic nerve?
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The optic nerve layer.
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Explain how cells synapse in the eye, starting with cone cells?
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A few cone cells synapse to a bipolar cell, which synapses on one ganglion cell. This creates higher acuity.
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What is the ratio of cone cells:bipolar cells:ganglion cells when they are synapsed in the fovea?
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1:1:1
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Explain the synapsing of cells in the eye, starting with Rod cells?
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Many rod cells synapse to one bipolar cell to one ganglion. This creates higher sensitivity.
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What do amacrine cells do? and what are they responsible for?
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They regulate bipolar cells and are responsible for 70% of input to retinal ganglion cells.
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What cells are responsible for 30% of the input to retinal ganglion cells?
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Bipolar cells.
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What do bipolar cells synapse with?
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photoreceptors.
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what do horizontal cells do?
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they regulate input from photo receptors. They are responsible for adjusting eyes to low/high light.
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How do the pupil and lens help to focus light entering the retina?
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The pupil has a light reflex where the iris can constrict or relax to let more or less light in, respectively.
The lens has an accommodation reflex, where the ciliary muscles contract, loosening the zonulas, making the lens rounded to focus on near objects. Ciliary muscles relaxing causes tight zonulas and a flat lens to focus on far away objects. |
