The Eye, The Ear

Question 1

Which nerve provides after ent impulses for vision

Answer 1

Optic II

Question 2

Which never provides motor control of eye and constricts iris

Answer 2

Oculomotor III

Question 3

Which 2 nerves supplies eyeball movement and proprioception

Answer 3

Trochlear IV and Abducens VI

Question 4

Which nerve controls lacrimal gland and tears

Answer 4

Facial VII

Question 5

Lacrimal caruncle provides elevation at medial comminsure and contains

Answer 5

Oil and sweat glands

Question 6

what percentage of sensory receptors are in the eye?

Answer 6

70%

Question 7

TRUE or FALSE: half of the cerebral cortex is involved with processing balance and hearing

Answer 7

FALSE: it is involved with vision

Question 8

Eyebrows prevent ??? from reaching the eye

Answer 8

perspiration.

Question 9

Conjunctiva is a ??? that produces a ??? that lubricates the eye

Answer 9

transparent membrane, produces mucous secretion

Question 10

bulbar conjunctiva lines which part of the eye, eyelids or white of the white of the eyes?

Answer 10

white of the eyes

Question 11

what secretion is made of a dilute saline solution containing mucus, antibodies, and
lysozyme

Answer 11

tears

Question 12

eyeball contains three layers, the fibrous, vascular and ???

Answer 12

sensory

Question 13

fibrous layer of eyeball consists of connective tissue called the ??? and ???

Answer 13

sclera and cornea

Question 14

does the sclera or cornea give eyeballs their shape?

Answer 14

sclera

Question 15

does the sclera or cornea bend light as it enters the eye?

Answer 15

cornea

Question 16

what helps make the cornea clear/ helps with clarity?

Answer 16

Sodium pumps of the corneal endothelium on
the inner face

Question 17

the vascular layer of the eye consists of three layers, the iris, choroid and ???

Answer 17

ciliary body

Question 18

which supplies blood to all regions of the eye, the choroid, iris or ciliary body?

Answer 18

choroid

Question 19

what does the choroid region do to prevent visual confusion

Answer 19

absorbs light to prevent visual
confusion

Question 20

what controls the lens shape?

Answer 20

ciliary body

Question 21

TRUE or FALSE: Capillaries of ciliary processes secrete fluid

Answer 21

TRUE

Question 22

what type of vision and light brightness causes sphincter papillae
(circular muscles) to contract; pupils constrict

Answer 22

close vision and bright light

Question 23

what type of vision and light brightness causes dilator papillae (radial
muscles) to contract; pupils dilate

Answer 23

distant vision and dim light

Question 24

is distant or close vision sympathetic response?

Answer 24

distant vision

Question 25

is distant or close vision a parasympathetic response?

Answer 25

close vision

Question 26

The sensory layer of the eye consists of ???

Answer 26

the retina

Question 27

the retina is a delicate 2-layered membrane that absorbs ??? and prevents ??? and stores ???

Answer 27

light and prevents its scattering and stores vitamin A

Question 28

the neural layer of the retina is a ??? that transduces light energy

Answer 28

photoreceptor

Question 29

TRUE or FALSE: the neural layer fo the retina contains bipolar cells, ganglion cells, amacrine cells, and horizontal cells

Answer 29

TRUE these help with transmitting and processing signals

Question 30

the optic nerve turns into ??? in the retina

Answer 30

ganglion cells

Question 31

the rods in the eye operate in dim or bright light and provide indistinct, fuzzy, non-colour peripheral vision?

Answer 31

dim

Question 32

the cones in the eye operate in dim or bright light and provide high-acuity colour vision?

Answer 32

bright

Question 33

cones are concentrated in what part of the eye?

Answer 33

the fovea centralis and are found in the macula lutea

Question 34

rods in the eye are more numerous at peripheral region of the retina, away from the ???

Answer 34

macula lutea

Question 35

vitreous humour transmits ??? and holds the neural retina firmly against

Answer 35

transmits light and holds neural retina against pigmented layer

Question 36

which humour supplies nutrients and oxygen mainly to the lens and cornea but also to the retina, and removes wastes

Answer 36

aqueous humour

Question 37

TRUE or FALSE: refraction is the Bending of a light ray due to change in speed when light passes from one transparent medium to another

Answer 37

TRUE

Question 38

does refraction need to occur for distant vision?

Answer 38

only a very small amount, as light rays from distant objects are nearly parallel at the eye and eye basically at rest

Question 39

for what type of vision must the eye make active adjustments?

Answer 39

close vision because light diverges at it gets closer to the eye

Question 40

high resolution vision is due to non-converging pathways in rods or cones?

Answer 40

cones

Question 41

what is the visual pigment of rods?

Answer 41

rhodopsin which is formed from vitamin A

Question 42

rhodopsin breaks down when ???

Answer 42

light enters the eye and is absorbed

Question 43

afferent impulses for hearing occurs in which part of what nerve?

Answer 43

the cochlear part of vestibulocochlear nerve

Question 44

afferent impulses for sense of balance occur in which part of what nerve?

Answer 44

the vestubular branch of vestibulocochlear

Question 45

what is the point of the auditory tube in the middle ear?

Answer 45

allows outside air in to equalise pressure

Question 46

what resppnds to gravity and changes in the position of the head in the ear?

Answer 46

the vestibule

Question 47

what is the vestibule?

Answer 47

it is a Central egg-shaped cavity of the bony labyrinth of semi circular canals

Question 48

semicircular canal receptors respond to what type of motion

Answer 48

rotational movements of the head

Question 49

where do sounds in the hearing range travel through?

Answer 49

through the cochlear duct, vibrating the basilar membrane at a specific location, according to the frequency of the sound

Question 50

what resonates in response to high-frequency pressure waves in the cochlea?

Answer 50

short, stiff fibres that span the width of the basilar membrane near oval window

Question 51

there is 1 row of inner hair cells and 3 rows of outer hair cells in what part of the cochlea?

Answer 51

the spiral organ

Question 52

maculae in the ear respond to which type of movement: rotation or linear acceleration forces?

Answer 52

linear acceleration forces

Question 53

whereabouts can you find maculae that respond to vertical movement of head

Answer 53

saccule

Question 54

whereabouts can you find maculae that respond to horizontal movements and tilting the head side to side?

Answer 54

the utricle

Question 55

how is the crista ampularis activated?

Answer 55

Cristae respond to changes in velocity of rotatory movements of the head