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Medical Terminology > Chapter 17 - Sense Organs > Flashcards

Chapter 17 - Sense Organs Flashcards

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USMLE® Step 1 flashcards
1
Q

Accomodation

A

Normal adjustment of the eye to focus on objects from far to near

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2
Q

Anterior Chamber

A

Area behind the cornea and in front of the lens and iris; contains aqueous humor

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3
Q

Aqueous Humor

A

Fluid produced by the ciliary body and found in the anterior chamber

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4
Q

Biconvex

A

Consisting of two surfaces that are rounded, elevated, and curved evenly, like part of a sphere

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5
Q

Choroid

A

Middle, vascular layer of the eye, between the retina and the sclera

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6
Q

Ciliary Body

A

Structure surrounding the lens that connects the choroid and iris. Contains ciliary muscles that control shape of lens

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7
Q

Cone

A

Photoreceptor cell in the retina that transforms light energy into a nerve impulse

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8
Q

Conjunctiva

A

Delicate membrane lining the undersurface of the eyelids and covering the anterior eyeball

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9
Q

Cornea

A

Fibrous transparent layer of clear tissue that extends over the anterior portion of the eyeball

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10
Q

Fovea Centralis

A

Tiny pit or depression in the retina that is the region of clearest vision

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11
Q

Fundus of the Eye

A

Posterior, inner part of the eye

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12
Q

Iris

A

Pigmented layer that opens and closes to allow more or less light into the eye

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13
Q

Lens

A

Transparent, biconvex body behind the pupil of the eye; refracts light rays to bring them into focus on the retina

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14
Q

Macula

A

Yellowish region on the retina lateral to and slightly below the optic disc; contains fovea centralis

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15
Q

Optic Chiasm

A

Point at which optic nerve fibers cross in the brain

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16
Q

Optic Disc

A

Region at the back of the eye where the optic nerve meets the retina

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17
Q

Optic Nerve

A

Cranial nerve carrying impulses from the retina to the brain

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18
Q

Pupil

A

Central opening of the eye, surrounded by the iris, through which light rays pass

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19
Q

Refraction

A

Bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina

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20
Q

Retina

A

Light-sensitive nerve cell layer of the eye containing photoreceptor cells

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21
Q

Rod

A

Photoreceptor cell of the retina essential for vision in dim light and for peripheral vision

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22
Q

Sclera

A

Tough, white outre coat of the eyeball

23
Q

Thalamus

A

Relay center of the brain. Optic nerve fibers pass through the thalamus on their way to the cerebral cortex.

24
Q

Vitreous Humor

A

Soft, jelly-like material behinds the lens in the vitreous chamber; helps maintain the shape of the eyeball

25
Q

aque/o

A

water

26
Q

blephar/o

palpebr/o

A

eyelid

27
Q

conjunctiv/o

A

conjunctiva

28
Q

cor/o

pupill/o

A

pupil

29
Q

corne/o

kerat/o

A

cornea

30
Q

cycl/o

A

ciliary body or muscle of the eye

31
Q

dacry/o

lacrim/o

A

tears, tear duct

32
Q

ir/o

irid/o

A

iris

33
Q

ocul/o

ophthalm/o

A

eye

34
Q

opt/o

optic/o

A

eye, vision

35
Q

papill/o

A

optic disc; nipple-like

36
Q

phac/o

phak/o

A

lens of the eye

37
Q

retin/o

A

retina

38
Q

scler/o

A

sclera

39
Q

uve/o

A

uvea; vascular layer of the eye

40
Q

vitre/o

A

glassy

41
Q

ambly/o

A

dull, dim

42
Q

dipl/o

A

double

43
Q

glauc/o

A

gray

44
Q

mi/o

A

smaller, less

45
Q

mydr/o

A

widen, enlarge

46
Q

nyct/o

A

night

47
Q

phot/o

A

light

48
Q

presby/o

A

old age

49
Q

scot/o

A

darkness

50
Q

xer/o

A

dry

51
Q

-opia

A

vision

52
Q

-opsia

A

vision

53
Q

-tropia

A

to turn

Medical Terminology (23 decks)

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