Sense Organs; Eye and Ear

Question 1

accommodation

Answer 1

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

Question 2

anterior chamber

Answer 2

area behind the cornea and in front of the lens and iris. contains aqueous humor

Question 3

aqueous humor

Answer 3

fluid produced by the ciliary body

Question 4

choroid

Answer 4

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

Question 5

ciliary body

Answer 5

structure on each side of the lens that connects the choroid and iris.

Question 6

conjunctiva

Answer 6

delicate membrane lining the eyelids and covering the eyeball

Question 7

cornea

Answer 7

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

Question 8

iris

Answer 8

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

Question 9

lens

Answer 9

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

Question 10

pupil

Answer 10

central opening of the eye, surrounded by the iris, through which light rays pass. it appears dark

Question 11

refraction

Answer 11

bending of light rays by the cornea, lens, and fluids of the eye to bring the rays into focus on the retina.
refract means to break back

Question 12

retina

Answer 12

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

Question 13

sclera

Answer 13

tough, white outer coat of the eyeball

Question 14

vitreous humor

Answer 14

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

Question 15

cataract

Answer 15

clouding of the lens, causing decreased vision

Question 16

diabetic retinopathy

Answer 16

retinal effects of diabetes mellitus

Question 17

glaucoma

Answer 17

increased intraocular pressure results in damage into the retina and optic nerve with loss of vision

Question 18

retinal detachment

Answer 18

two layers of the retina separate from each other

Question 19

strabismus

Answer 19

abnormal deviation of the eye

Question 20

auditory tube

Answer 20

channel between the middle ear and the nadopharynx; eudtachian tube

Question 21

auricle

Answer 21

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

Question 22

cochlea

Answer 22

small shell-shaped, spirallywound tube in the inner ear; contains hearing-sensitive receptor cells

Question 23

endolymph

Answer 23

fluid within the labyrinth of the inner ear

Question 24

incus

Answer 24

second ossicle (small bone) of the middle ear; anvil

Question 25

labyrinth

Answer 25

maze-like series of canals of the inner ear.

Question 26

malleus

Answer 26

first ossicle of the middle ear; hammer

Question 27

oval window

Answer 27

membrane between the middle ear and the inner ear

Question 28

perilymph

Answer 28

fluid contained in the labyrinth of the inner ear

Question 29

pinna

Answer 29

auricle; flap of the ear

Question 30

semicircular canals

Answer 30

passages in the inner ear associated with maintaining equilibrium

Question 31

stapes

Answer 31

third ossicle of the middle ear; stirrup

Question 32

tymphanic membrane

Answer 32

membrane between the outer and the middle ear; eardrum

Question 33

vestibule

Answer 33

central cavity of the labyrinth, connecting the semicircular canals and the cochlea. contains two structures, saccule and utricle.