14 contd

Question 1

25. Light is perceived when:

Answer 1

Photoreceptors hyperpolarize, allowing bipolar cells to depolarize

Question 2

21. Blood vessels enter the eye through the:

Answer 2

C. Optic disc

Question 3

20. Which structure detects rotational movements?

Answer 3

Cupula of a crista ampullaris

Question 4

18. A person with 20/40 vision:

Answer 4

C. Must be closer to objects to see clearly

Question 5

17. Which photopigment is most abundant in the retina?

Answer 5

D. Rhodopsin

Question 6

15. Which membrane is directly associated with the organ of Corti?

Answer 6

C. Tectorial membrane

Question 7

14. The fovea centralis contains mostly:

Answer 7

cones

Question 8

What causes pupil dilation?

Answer 8

Sympathetic stimulation of the radial muscle

Question 9

The basilar membrane is part of the:

Answer 9

Membranous labyrinth

Question 10

Which part of the ear contains perilymph?

Answer 10

Cochlea (bony labyrinth)

Question 11

During dark adaptation:

Answer 11

Rhodopsin regenerates slowly

Question 12

Which photopigment is found in rods?

Answer 12

Rhodopsin

Question 13

Which fluid drains through the canal of Schlemm?

Answer 13

Aqueous humor

Question 14

1. Which structure bends during rotational (dynamic) movements of the head?

Answer 14

B. Cupula

Question 15

Parts of the vascular tunic

Answer 15

A. Choroid
B. Ciliary body
C. Iris

Question 16

31. Which structure contains erythrolabe?

Answer 16

D. Red cones

Question 17

The round window’s main function is to:

Answer 17

Relieve pressure in the scala tympani

Question 18

What stimulates the radial muscle of the iris?

Answer 18

Norepinephrine from sympathetic nerves

Question 19

Otoliths contribute primarily to sensing:

Answer 19

Linear acceleration and gravity

Question 20

Which structure is in contact with endolymph?

Answer 20

Cochlear duct (scala media)

Question 21

Adjusting vision in light and dark situations

Answer 21

adaptation

Question 22

Sensory organs within an ampulla of the
membranous labyrinth

Answer 22

crista

Question 23

One of two receptors responding to electromagnetic
energy

Answer 23

photoreceptor

Question 24

Connection between the scala vestibuli and scala
tympani

Answer 24

helicotrema

Question 25

The scala ___ is the superior chamber in the cochlea

Answer 25

vestibuli

Question 26

Name associated with the sense of hearing

Answer 26

corti

Question 27

Equilibrium related to angular movements of the body

Answer 27

dynamic

Question 28

Iris muscle that contracts to decrease the pupil's diameter

Answer 28

circular

Question 29

Gelatinous structure on top of a crista ampullaris

Answer 29

cupula

Question 30

Fluid within the membranous labyrinth

Answer 30

endolymph

Question 31

Membranous duct containing the organ of hearing

Answer 31

cochlear

Question 32

Crystallin protein structure that focuses an image on the fovea

Answer 32

lens

Question 33

The most lateral ear ossicle

Answer 33

malleus

Question 34

Makes up most of the eyeball's middle layer of tissue

Answer 34

choroid

Question 35

The middle portion of the bony labyrinth

Answer 35

vestibule

Question 36

Iris muscle that contracts to decrease the pupil's diameter

Answer 36

sphincter

Question 37

Another term for an eyelid

Answer 37

palpebra

Question 38

he functional name for the optic disc is the ___ ___

Answer 38

blind spot

Question 39

The middle ear ossicle

Answer 39

incus

Question 40

Eye chamber containing a watery fluid

Answer 40

aqueous

Question 41

Saclike structure at the base of a semicircular duct

Answer 41

ampulla

Question 42

"Body" that contracts and relaxes to change the shape of the eye lens

Answer 42

suspensory

Question 43

Gelatinous membrane associated with hearing

Answer 43

tectorial

Question 44

8 Membranous labyrinth item containing a horizontally- oriented macula 7

Answer 44

utricle

Question 45

10 Chemical that bleaches ibn response to visible light wavelengths 12

Answer 45

photopigment

Question 46

12 Fluid between the bony labyrinth and membranous labyrinth 9

Answer 46

perilymph

Question 47

14 Iris muscle that contracts to increase the pupil's diameter 6

Answer 47

radial

Question 48

23 Iris muscle that contracts to increase the pupil's diameter 7

Answer 48

dilator

Question 49

29 Retinal layer that contains rods and cones 6

Answer 49

neural

Question 50

30 Type of photoreceptor needed for perception of colors 4

Answer 50

cone

Question 51

31 Makes up most of the eyeball's fibrous tunic 6

Answer 51

sclera

Question 52

32 The ___ labyrinth includes fluid-filled cavities and tubes in the temporal bone 4

Answer 52

bony

Question 53

General name for the protein found in all cones 11

Answer 53

phototopsin

Question 54

Most abundant photopigment in the retina

Answer 54

rhodopsin

Question 55

Most abundant photopigment in the retina

Answer 55

rods

Question 56

Most abundant photopigment protein in the retina

Answer 56

scotopsin

Question 57

he scala ___ in the membranous labyrinth tube contains the spiral organ

Answer 57

scalamedia

Question 58

The second most abundant cone photopigment

Answer 58

cyanolabe

Question 59

26 The middle layer of tissue in an eyeball vascular

Answer 59

saccule

Question 60

8 Another name for the innermost layer in the wall of an eyeball 7

Answer 60

retina

Question 61

9 The least abundant cone photopigment 10

Answer 61

chlorolabe

Question 62

12 Membrane potential change in photoreceptors in the dark 14

Answer 62

depolarization

Question 63

14 Type of photopigment found in rods 9

Answer 63

rhodopsin

Question 64

16 Inner tunic of the eye containing photoreceptors 7

Answer 64

nervous

Question 65

17 Adaptation involving the ability of the eyes to adjust to dim light 4

Answer 65

dark

Question 66

23 Gelatinous membrane on a macula in the membranous labyrinth 9

Answer 66

otolithic

Question 67

General name for the protein found in the photopigment of all rods and cones 5

Answer 67

opsin

Question 68

Outer tunic of eyeball including the sclera and cornea 7

Answer 68

fibrous

Question 69

Membranous structure that transmits vibrations to the malleus 8

Answer 69

tympanum

Question 70

3 The most abundant cone photopigment 11

Answer 70

erythrolabe

Question 71

6 The ___ ____ contains a small pit with cones but no rods 11

Answer 71

macula lutea

Question 72

Suspensory ligaments tighten when viewing objects moving 6

Answer 72

(closer

Question 73

9 Mucous membrane over the eye and inner surface of eyelids 11

Answer 73

conjunctiva

Question 74

21 "Disc" in retina where axons exit the eyeball 5

Answer 74

optic

Question 75

22 The most medial ear ossicle 6

Answer 75

stapes

Question 76

10 Tubes of the bony labyrinth oriented in three different planes 12

Answer 76

semicircular

Question 77

11 Name for any photopigment in a cone 10

Answer 77

iododopsin

Question 78

13 Eponym in a name for the scleral venous sinus 7

Answer 78

schlemm

Question 79

15 Retinal layer that contains melanin 9

Answer 79

pigmented