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Histology > Histology Of The Eye > Flashcards

Histology Of The Eye Flashcards

1
Q

What are the 3 tunics of the eye?

A

1 fibrous tunic
2 vascular tunic
3 inner tunic

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2
Q

What are the components of the fibrous tunic?

A

Sclera and cornea

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3
Q

What are the components of the vascular tunic?

A

Choroid, ciliary body, and iris

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4
Q

What is/are the component(s) of the inner tunic?

A

Retina

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5
Q

What are the sclera layers? (3)

A

1 episcleral layer
2 Sclera proper
3 lamina cribrosa

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6
Q

T/F: the episcleral layer is innervated

A

False; highly vascular

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7
Q

Sclera proper is the attachment site for…

A

Tendons of extrinsic eye muscles

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8
Q

T/F: Anteriorly the sclera is continuous with the cornea

A

T

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9
Q

T/F: The junction between the two is limbus; it is highly innervated

A

F; highly vascularized

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10
Q

T/F: Posteriorly the sclera is continuous with the dural covering of the optic nerve

A

T

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11
Q

What are the cornea layers? (5)

A 
1 corneal epithelium 
2 Bowman’s membrane 
3 corneal storms
4 descemet’s membrane
5 corneal endothelium
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12
Q

The choroid contains loose or tight CT?

A

Loose

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13
Q

What is the acellular fused basal laminate of choriocapillaris and pigmented retinal epithelium

A

Bruch’s (glassy) membrane

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14
Q

Ciliary body is covered by a double or single layer of cells?

A

Double

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15
Q

What is the layer of cells that produce the aqueous humor

A

Nonpigmented surface layer

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16
Q

The iris has a double or single layer of epithelium?

A

Double

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17
Q

The retina has 2 subdivisions that are divided by the?

A

Ora serrated

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18
Q

What causes glaucoma?

A

Increased pressure due to compromised drainage of aqueous humor from anterior chamber

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19
Q

What are the chambers of the eye?

A

Anterior, posterior, and vitreal chamber

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20
Q

Bipolar cells conducting neurons that synapse with?

A

Rods and cones

21
Q

Horizontal cells inter neurons that interconnect rods and cones with each other and with?

A

Bipolar cells

22
Q

Amacrine cells interneurons that connect __ cells and bipolar neurons

A

Ganglion cells

23
Q

Muller cells are __ cells that extend throughout retina

A

Neurological cells

24
Q

Ganglion cells are conducting neurons whose axons form the fibers of the __?

A

Optic nerve

25
Q

Fovea has the highest __?

A

Visual acuity

26
Q

Macula lutea is the yellow region surrounding the?

A

Fovea

27
Q

Fovea centralis has the highest density of __ cells

A

Cone

28
Q

Optic disc lacks

A

Photoreceptors

29
Q

Optic disc aka as __ of retina

A

Blind spot

30
Q

Fovea centralis lacks __ cells and __

A

Rod cells and capillaries

31
Q

Rod aka

A

Spherule

32
Q

Cone aka

A

Pedicle

33
Q

Inner segment contains

A

Mitochondria and other organelles

34
Q

Cell body contains

A

Nucleus and short axon

35
Q

Rods use __ as photopigment

A

Rhodopsin

36
Q

Rod are sensitive to __ light intensity and responsible for what type of vision?

A

Low light and black and white vision

37
Q

Cones use how man different kinds of iodopsins

A

3

38
Q

Cones are sensitive to __ intensity light and responsible for what type of vision?

A

High intensity and color vision

39
Q

How many rods synapse it’s single bipolar cell

A

Up to 100 rods

40
Q

How man cone cells synapse with a single bipolar cell

A

1 cone cell

41
Q

The ganglion cell layer contain what type of cells?

A

Cell bodies of ganglion cells

42
Q

Optic nerve layer contain what type of cells?

A

Axons of ganglion cells

43
Q

Pigmented epithelial cells synthesize what?

A

Melanin

44
Q

What type of protein is rhodopsin?

A

Transmembrane glycoprotein

45
Q

What is bleaching?

A

Disassembly of rhodopsin into opsin and retinal after light stimulation

46
Q

What are the 3 parts to a lens?

A

Capsule, anterior epithelium, and lens nucleus

47
Q

What are the 2 glands associated with the eyelid?

A

Glands of Zeiss (sebaceous gland)

Glands of MOll (sweat glands)

48
Q

What fascia is the fibrous core of eyelids? And what gland is found here?

A

Palpebral fascia and meibomian glands (sebaceous)

49
Q

What lines the inner surface of eyelids, covers eyeball, and has stratified columnar/squamous epithelium with goblet cells?

A

Paperbral conjunctiva

Histology (11 decks)

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