Chapter 17: The Eye and Ear

Question 0

anterior chamber

Answer 0

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

Question 1

accommodation

Answer 1

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

Question 2

aqueous humor

Answer 2

fluid produced by the ciliary body and found in the anterior chamber.

Question 3

biconvex

Answer 3

consisting of two surfaces that are rounded, elevated, and curved evenly like part of a sphere.
the lens of the eye is a biconvex body

Question 4

choroid

Answer 4

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

Question 5

ciliary body

Answer 5

structure surrounding the lens that connects the choroid and the iris. contains ciliary muscle which controls shape of the lens

Question 6

cone

Answer 6

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

Question 7

conjunctiva

Answer 7

delicate membrane linking the undersurfaces of the eyelid and covering the anterior eyeball

Question 8

cornea

Answer 8

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

Question 9

fovea centralis

Answer 9

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

Question 10

fundus of the eye

Answer 10

posterior, inner part of eye.

Question 11

iris

Answer 11

pigmented layer that opens and closes to allow more or less into the eye. central opening or iris is retina

Question 12

lens

Answer 12

transparent, biconvex body behind the pupil of the eye. bends light rays to bring them into focus

Question 13

macula

Answer 13

yellowish region on the retina lateral to and slightly below the the optic disc. contains fovea centralis, which is area of clearest vision

Question 14

optic chiasm

Answer 14

point at which optic nerve fibers cross in the brain

Question 15

optic disc

Answer 15

region at the back of the eye where the optic nerve meets the retina. insensitive to light only contains nerve fibers known as the blind spot.

Question 16

optic nerve

Answer 16

cranial nerve carrying impulses from the retina to the brain.

Question 17

pupil

Answer 17

central opening of the eye, surrounded by iris. appears dark

Question 18

refraction

Answer 18

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

Question 19

retina

Answer 19

light-sensitive nerve cell layer of the eye containing photoreceptor cells (rods and cones)

Question 20

rod

Answer 20

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

Question 21

sclera

Answer 21

tough, white outer coat of the eyeball

Question 22

thalamus

Answer 22

relay center if the brain. optic nerve fibers pass through the thalamus on their way to the cerebral cortex

Question 23

vitreous humor

Answer 23

soft jelly like material behind the lens in the vitreous chamber; helps maintain shape of eyeball.

Question 24

pathway of light rays from cornea to brain

Answer 24

cornea, anterior chamber & aqueous humor, pupil, lens, vitreous chamber, retina (rods and cones)// optic nerve fibers, optic chiasm, thalamus, cerebral cortex

Question 25

aque/o

Answer 25

water

Question 26

blephar/o

Answer 26

eyelid

Question 27

conjunctiv/o

Answer 27

conjunctivia

Question 28

cor/o

Answer 28

pupil

Question 29

corne/o

Answer 29

cornea

Question 30

cycl/o

Answer 30

ciliary body or

muscle of the eye

Question 31

dacry/o

Answer 31

tears, tear duct

Question 32

ir/o. irid/o

Answer 32

iris

Question 33

kerat/o

Answer 33

cornea

Question 34

lacrim/o

Answer 34

tears

Question 35

ocul/o

Answer 35

eye

Question 36

ophthalm/o

Answer 36

eye

Question 37

opt/o. optic/o

Answer 37

eye, vision

Question 38

palpebr/o

Answer 38

eyelid

Question 39

papill/o

Answer 39

optic disc; nipple like

Question 40

phac/o. phak/o

Answer 40

lens of the eye

Question 41

pupill/o

Answer 41

pupil

Question 42

retin/o

Answer 42

retina

Question 43

scler/o

Answer 43

sclera;hard

white of the eye

Question 44

uve/o

Answer 44

uvea; vascular layer of eye

Question 45

vitre/o

Answer 45

glassy

Question 46

ambly/o

Answer 46

dull, dim

Question 47

dipl/o

Answer 47

double

Question 48

glauc/o

Answer 48

gray

Question 49

mi/o

Answer 49

small, less

Question 50

mydr/o

Answer 50

widen, enlarge

Question 51

nyct/o

Answer 51

night

Question 52

phot/o

Answer 52

light

Question 53

presby/o

Answer 53

old age

Question 54

scot/o

Answer 54

darkness

Question 55

xer/o

Answer 55

dry

Question 56

-opia

Answer 56

vision

Question 57

-opsia

Answer 57

vision

Question 58

-tropia

Answer 58

to turn