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Medical Terminology > Chapter 17 > Flashcards

Chapter 17 Flashcards

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USMLE® Step 1 flashcards
1
Q

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

A

accomidation

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2
Q

the area behind the cornea and in front of the lend and iris

A

anterior chamber

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3
Q

fluid produced by the ciliary body and found in anterior chamber

A

aqueous humor

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4
Q

consisting of two surfaces that are rounded, elevated, and curved evenly; lens of the eye is biconvex

A

biconvex

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5
Q

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

A

choroid

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6
Q

structure surrounding the lens that connects the choroid and iris; controls shape of lens and secretes aqueous humor

A

ciliary body

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7
Q

photoreceptor cell in the retina that transforms light energy into a nerve impulse; responsible for color and central vision

A

cone

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8
Q

delicate membrane that lines the undersurface of eyelids and covers anterior eyeball

A

conjunctiva

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9
Q

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

A

cornea

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10
Q

tiny depression in the retina that is the region of clearest vision

A

fovea centralis

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11
Q

posterior, inner part of the eye

A

fundus of the eye

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12
Q

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

A

iris

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13
Q

transparent, biconvex body behind the pupil of the eye

A

lens

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14
Q

yellowish region on the retina lateral to and slightly below the optic disc

A

mascula

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15
Q

the point at which optic nerve fibers cross the brain

A

optic chiasm

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16
Q

the region at the back of the eye where the optic nerve meets the retina; blind spot

A

optic disc

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17
Q

cranial nerve carrying impulses from the retina to the brain

A

optic nerve

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18
Q

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

A

pupil

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19
Q

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

A

refraction

20
Q

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

A

retina

21
Q

photoreceptor cell of retina essential for vision in dim light and for peripheral vision

A

rod

22
Q

tough, white outer coat of the eyeball

A

sclera

23
Q

relay center of the brain

A

thalamus

24
Q

soft, jelly-like material behind the lens in the vitreous chamber

A

vitreous humor

25
Q

channel that leads from the pinna to the eardrum

A

auditory canal

26
Q

auditory canal

A

auditory meatus

27
Q

carry impulses from the inner ear to the brain

A

auditory nerve fibers

28
Q

channel between the middle ear and nasopharynx; Eustachian tube

A

auditory tube

29
Q

flap of the ear; protruding part of external ear, or pinna

A

auricle

30
Q

waxy substance secreted by the external ear; also called earwax

A

cerumen

31
Q

snail-shaped, spirally wound tube i the inner ear

A

cochlea

32
Q

fluid within the labyrinth of the inner ear

A

endolymph

33
Q

auditory tube

A

eustachian tube

34
Q

second ossicle of the middle ear

A

incus

35
Q

maze-like series of canals of the inner ear

A

labyrinth

36
Q

first ossicle of the middle ear

A

malleus

37
Q

sensitive auditory receptor area found in the cochlea of the inner ear

A

organ of Corti

38
Q

small bone of the ear

A

ossicle

39
Q

membrane between the middle ear and the inner ear

A

oval window

40
Q

fluid contained in the labyrinth of the inner ear

A

perilymph

41
Q

auricle; flap of the ear

A

pinna

42
Q

passages in the inner ear associated with maintaining equilibrium

A

semicircular canals

43
Q

third ossicle of the middle ear

A

stapes

44
Q

central cavity of the labyrinth, connecting the semicircular canals and the cochlea

A

vestibule

45
Q

membrane between the outer and the meddle ear; eardrum

A

tympanic membrane

Medical Terminology (39 decks)

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