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Neuro Week 3 > Eye Histology > Flashcards

Eye Histology Flashcards

1
Q

what are the three parts of the uvea?

A

choroid

iris and ciliary body

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2
Q

what types of collagen exist in the cornea?

A

type I and IV

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3
Q

what are the two muscles in the iris?

A

contrictor pupillae and dilator pupillae

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4
Q

what muscle is on the ciliary body

A

ciliary muscle

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5
Q

what is action of the ciliary muscle?

A

contrict ciliary body and relax tension on lens to allow for lens accomodation

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6
Q

what nerve stimulates the ciliary muscle

A

the CNIII

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7
Q

what happens to shape of lens when accommodation occurs?

A

rounder in shape…

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8
Q

when do you want lens accommodation?

A

when you are using close vision

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9
Q

chronic glaucoma leads to what loss of vision?

A

peripheral loss of vision

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10
Q

what type of protein is in the lens of the eye?

A

crystalline protein

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11
Q

what is lost in lens cells of the eye?

A

no organelles in the cells

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12
Q

what syndrome is associated with a dislocated lens?

A

marfan syndrome

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13
Q

what cell layer in retina is closest to optic nerve layer?

A

ganglion cell layer

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14
Q

optic nerve fibers synapse with what cell immediately in the retina?

A

ganglion cells

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15
Q

what layer of retina do rod and cones exist

A

photoreceptor layer

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16
Q

cones see what?

A

color

17
Q

rods see what?

A

dark light

18
Q

what is the deepest layer of the retina called?

A

retinal pigment epithelium

19
Q

rods are sensitive to low or high light?

A

low light

20
Q

what cells do rods synapse with? one or many?

A

bipolar neurons…many

21
Q

cones are sensitive to high or low intensity light

A

high

22
Q

what is more numerous, rods or cones?

A

rods

23
Q

what cells do cones synapse with? one or many?

A

bipolar neurons too…only one though

24
Q

name the cell types moving from optic nerve to rods/cones

A

optic nerve…ganglion cell…bipolar/horizontal/amacrine cell…rod/cone

25
Q

what are most ganglion cells used for?

A

light transmission of information

26
Q

what are 3% of ganglion cells used for?

A

directly connected to pineal gland and help in diurnal function

27
Q

central retinal artery occlusion leads to what on fundoscopy?

A

cherry red spot at macula

28
Q

what is usual cause of central retinal artery occlusion?

A

atherosclerosis

29
Q

what vision is lost with detachment of the retina?

A

loss of peripheral vision

30
Q

what is retinitis pigmentosa?

A

inherited disorder of photoreceptors

31
Q

what is vision change in retinitis pigmentosa?

A

tunnel vision..night blindness

Neuro Week 3 (13 decks)

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