Chapter 16 pt3

Question 1

eyes are almost

Answer 1

spherical

Question 2

eye has the prescence of a _____ and _____ cavity

Answer 2

posterior and anterior

Question 3

posterior cavity

Answer 3

contains permanent vitreous humor

Question 4

anterior cavity

Answer 4

contains circulating aqeous humor

Question 5

posterior cavity is the

Answer 5

largest portions of the eye

Question 6

posterior cavity is located

Answer 6

behind lens

Question 7

anterior cavity is in front of lens behind

Answer 7

behind cornea

Question 8

eye has 3 tunics/layers called

Answer 8

fibrous(external)
vascular(middle)
retina(inner)

Question 9

parts of fibrous tunic

Answer 9

sclera

Question 10

vasular tunic contains

Answer 10

choroid
ciliary body
iris

Question 11

retina area contains

Answer 11

pigmented layer
neurel layer

Question 12

fibrous tunic is a ______ outer layer

Answer 12

tough

Question 13

sclere is the _____ of the eye

Answer 13

white

Question 14

conrea is anterior ______ transparent

Answer 14

convex “window”

Question 15

limbus

Answer 15

corneal scleral junction

Question 16

vascular tunic contains many

Answer 16

blood vesselrs

Question 17

area with many capillaries and blood vessels is

Answer 17

choroid

Question 18

choroid brings nourishment to

Answer 18

retinal cells

Question 19

melanocyts make ____ to absorbe extraneous light

Answer 19

melanin

Question 20

ciliary muscles and cililary processes help

Answer 20

hold the lens in place, and help with its manipulation

Question 21

ciliary muscles

Answer 21

bands of smooth muscle connected to lens; alters lens shap

Question 22

cililary processes

Answer 22

contains capillaries secreting aqeous humor

Question 23

iris gives _____ to eye

Answer 23

color

Question 24

iris contains

Answer 24

smooth muscles, melanocytes, vessels, and neurel structures

Question 25

iris divides into 2 chambers

Answer 25

anterior and posterior chambers

Question 26

pupil is

Answer 26

opening in the center of the iris connecting the 2 chambers

Question 27

iris controls

Answer 27

pupil diameter

Question 28

Retina is the

Answer 28

innermost layer of eye

Question 29

what are the three sublayers of retina

Answer 29

photoreceptor cell layer bipolar layer ganglion cell layer

Question 30

photoreceptor cell layer

Answer 30

outermost layer, contains rods and cones.

Question 31

what layer of retina contains pigment that reacts with light

Answer 31

Retina

Question 32

Bipolar cell layer

Answer 32

dendrites receieve synaptic input from rods and cones

Question 33

Ganglion cell layer

Answer 33

innermost neural layer

Question 34

what cel layer has axons that father at optic discs an form optic nerve.

Answer 34

ganglion cell layer

Question 35

ganglion cell layer is capable of

Answer 35

action potentials

Question 36

Components of the Retina

Answer 36

optic discs, macula lutea, peripheral retina

Question 37

optic disc contains no

Answer 37

photoreceptors

Question 38

the optic disc is where

Answer 38

ganglion axons exit towards brain

Question 39

optic disc is a

Answer 39

blond spot

Question 40

macula lutea is a

Answer 40

round, yellow region lateral to optic disc

Question 41

what contains fovea centralis

Answer 41

macula lutea

Question 42

what has the high proportion of cones (few rods) and has the sharpest vision

Answer 42

macula lutea

Question 43

the peripheral retina contains mainly

Answer 43

primarily rods

Question 44

which part of the retina functions most effectively in low light

Answer 44

peripheral retina

Question 45

fovea centralis is like a

Answer 45

center of cones

Question 46

rods are ____ and _____ then cones; more numerous

Answer 46

longer and narrower

Question 47

each rod is highly sensitive and even react to ______

Answer 47

dim light

Question 48

rods can result in sensitivity to dim light but a

Answer 48

blurry image and gray scale images

Question 49

cones respond to

Answer 49

bright light

Question 50

cones allow for

Answer 50

collor vision and sharp vision

Question 51

the ear detects

Answer 51

sound and head movement

Question 52

external ear cmposed of

Answer 52

auricle, external acoustic meatus, tympanic membrane

Question 53

auricle

Answer 53

funnel shaped. visible part of ear with elastic cartilage

Question 54

tympanic membrane

Answer 54

ear drum;funnel shaped and seperated external and middle ear.

Question 55

external acoustic medias extends to

Answer 55

tympanic membrain

Question 56

the auricle protects

Answer 56

entryway and directs sound waves inward

Question 57

what vibrates when sound waves hit it

Answer 57

tymapnic membrane

Question 58

external acoustic meatus is the

Answer 58

ear canal

Question 59

ceruminous glands produce

Answer 59

cerumen

Question 60

ear wax impedes

Answer 60

microorganism growth

Question 61

midd ear contains

Answer 61

air filled tympanic cavity

Question 62

what seperates middle ear from inner ear

Answer 62

bony wall

Question 63

in the middle ear is the

Answer 63

tympanic cavity and auditory tube

Question 64

what allows release of air and fluid one pressure builds up

Answer 64

auditory tube

Question 65

auditory ossicles are

Answer 65

the three tiny bones of middle ear

Question 66

what are the auditory ossicles

Answer 66

malleus incus stapes

Question 67

the malleus is attached to

Answer 67

medial surface of tympanic membrane

Question 68

incus

Answer 68

middle possicle resembing and anvil

Question 69

stapes

Answer 69

resembles a stirrup of a saddle

Question 70

what auditory ossicle has a disclike fooplate fitting into an oval window

Answer 70

stapes

Question 71

auditory ossicles ____ sound waves

Answer 71

amplify

Question 72

auditory ossicles trasmit sound waves to

Answer 72

oval window

Question 73

auditory ossicles ______ along with the eardrum so the stapes moves in and out of oval window

Answer 73

vibrate

Question 74

two small muscles restrict ossicle movement during loud sounds

Answer 74

tensor tympani and stapesdius

Question 75

tensor tympani

Answer 75

attaches to malleus

Question 76

stepedius

Answer 76

attaches to stapes

Question 77

the inner ear is compised of 2

Answer 77

labarynths

Question 78

what are the 2 labyrinths that compose inner ear

Answer 78

bony labyrinth and membraneous labyrinth

Question 79

bony labyrinth

Answer 79

maselike spaces in temperoal bone

Question 80

membraneous labyrinth

Answer 80

membrane-lined fkuid filled tubes within bony labyrinth

Question 81

bony labyrinth is filled with own fluid called

Answer 81

parilymph

Question 82

membraneous labyrinth fuilled wih own fluid called

Answer 82

endolymph (rich in potassium)

Question 83

both fkluids in inner ear vibrate and respond to

Answer 83

sound waves

Question 84

inner ear covered by the

Answer 84

labyrinths

Question 85

inner ear is composed of three main regions

Answer 85

cochlea, vestibule, semicircular canals

Question 86

cochlea

Answer 86

houses membraneous cochlear duct

Question 87

vestibule

Answer 87

contains two saclike membraneous parts

Question 88

semicircular canals

Answer 88

contains membraneous semicircular ducts

Question 89

the two saclike membraeous oart of vestibuile are

Answer 89

utricle and saccule. they are positioned in right angles