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Anatomy and Physiology 1 > eye - unit 5 > Flashcards

eye - unit 5 Flashcards

1
Q

protects eye from sweat. helps shade eyes. hair follicles above eye.

A

eyebrow

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2
Q

protects the eye from objects, blinking reflex, helps shade eys, contains eyelashes (“eyelids”)

A

palpabrae

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3
Q

infection of the oil gland connected to eyelash

A

stye

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4
Q

membrane infront of eyeball, it folds and lines the eyelid. secretes mucous, protects eyes, contains small blood vessels

A

conjuctiva

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5
Q

“pink eye” inflammation of conjunctiva from infection

A

conjuctivitis

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6
Q

“tear glands” in eye socket above eyeball. secretes tears

A

lacrimal gland

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7
Q

contain h20, mucous, and lysozyme. helps lubricate eye, prevent infection, and displays emotion.

A

tears

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8
Q

drains tears, found beneath skin of nose

A

lacrimal sacs

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9
Q

drains tears from lacrimal sacs into nasal cavity

A

nasolacrimal duct

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10
Q

6 muscles that stabilize/hold/allow movement of eye.

A

extrinsic eye muscles

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11
Q

3 layers of the eyeball

A

fibrous tissue, vascular tissue, and sensory tunic

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12
Q

outer layer of the eyeball

A

fibrous tunic

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13
Q

two parts of the fibrous tissue

A

sclera and cornea

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14
Q

fibrous tissue. in rear portion of eye, white dense irregular CT that contains blood vessels. provides strength and spherical structure, anchors the extrensic eye muscles

A

sclera

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15
Q

fibrous tissue. front shield of eye, transparent. only place in body to not get nutrition from blood and not be effected by the immune system. it bends light to help focus light into retina.

A

cornea

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16
Q

middle layer of the eyeball

A

vascular tissue

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17
Q

4 parts of the vascular tissue

A

choroid, ciliary body, iris, pupil

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18
Q

vascular tissue. rear portion, dark brown (high melanin). onsorbs light that passes through retina (prevents light scattering/reflecting)

A

choroid

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19
Q

vascular tissue. infront of choroid, dark brown ring with smooth muscles that attach to lens via suspensory ligaments. filters blood + forms aqueous humor that flows through front compartment

A

ciliary body

20
Q

vascular tissue. ring of smooth muscle in front of lens, surrounds pupil, regulates amount of light passing, contains melanocytes and melanin. gives rise to eye color.

A

iris

21
Q

hole in middle front of eye that allows light in pass through to lens

A

pupil

22
Q

when iris increases pupil diameter

A

pupil dialation

23
Q

when iris decreases pupil diameter

A

pupil constriction

24
Q

deepest layer of the eyeball. contains photoreceptor cells and sensory neurons.

A

sensory tunic

25
Q

two parts of sensory tunic

A

optic disc, macula lutea

26
Q

sensory tunic. blind spot. axons of retinas sensory neurons exit eyeball and form optic nerve. no photoreceptor cells. light projected here is invisible.

A

optic disc

27
Q

sensory tunic. round patch in retina that has increase number of cone photoreceptor cells, light is focused.

A

macula lutea

28
Q

two types of photoreceptor cells

A

rods and cones.

29
Q

photoreceptor cell. gives rise to grayscale vision.

A

rods

30
Q

photoreceptor cell. gives rise to color vision.

A

cones

31
Q

made of transparent (clea) crystalized cells, behind iris and pupil. attached to cicilary body via suspensory ligaments which alter lens shape via contraction

A

lens

32
Q

clear water-like fluid formed by filtration of blood

A

aqueous humor

33
Q

gel-like fluid which holds retina in place

A

vitreous humor

34
Q

3 eye diseases

A

cataract, glaucoma, macula degeneration

35
Q

eye disease. clouding of lens.

A

cataract

36
Q

eye disease. damige to optic nerve/sensory nuerons of retina

A

glaucoma

37
Q

eye disease. photoreceptors in macula lutea die.

A

macula degeneration

38
Q

to view a ____ object, your iris contracts and pupil constricts. lens buldge to inc bending of light.

A

close

39
Q

to view a ____ object, your iris contracts and pupil dialate. lens flatten to dec bending of light.

A

far

40
Q

3 types of vision conditions

A

nearsightedness, farsightedness, astigmatism

41
Q

vision condition. person cannot see far away. long oblong eye so lens cant flatten enough.

A

nearsightedness

42
Q

vision condition. person cannot see up close. wide oblong eye so lens cant buldge.

A

farsightedness

43
Q

vision condition. irregular curvature of eye’s cornea

A

astigmatism

44
Q

near point of vision is

A

how close you can focus on an object. inc with age.

45
Q

genetic condition in which you lack a photoreceptor cone type

A

colorblindness

46
Q

down-regulation of photoreceptors

A

photobleaching

Anatomy and Physiology 1 (19 decks)

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