Special Senses (visual system)

Question 1

What does this system include

Answer 1

Vision
Hearing
Balance
Taste
Olfaction

Question 2

___ is our dominant sense

Answer 2

Vision

Question 3

This lobe is involved with vision, perception, interpretation of images

Answer 3

Occipital

Question 4

5 components of visual system

Answer 4

Lacrimal apparatus
Palpebrae (eye lids)
Conjunctiva 
Glands
Extrinsic eye muscles

Question 5

Short coarse hair that help shade eyes from sunlight, prevent sweat from dripping into eyes, aid in keeping larger particles from reaching the eye

Answer 5

Eye brows

Question 6

This protects eye and keeps them from drying out

Answer 6

Eye lid (palpebrae)

Question 7

Space between upper and lower lids

Answer 7

Palpebrae fissure

Question 8

What do follicles of eye lashes have that make eye blink if anything touches the eye lash?

Answer 8

Sensory receptora

Question 9

Commissure that contains sebaceous and sweat glands and produces whitish secretion “sandmans eye sand”

Answer 9

Lacrimal caruncle/ medial commissure

Question 10

Thinnest skin of body supported by CT that serves as an anchoring point for orbicularis oculi and levator palpebrae superioris muscles

Answer 10

Tarsal plates

Question 11

Which glands are embedded in the tarsal plates which open at edge of eyelid? They secrete oil preventing eyelids of sticking together

Answer 11

Tarsal/ Meibomian glands

Question 12

Gland that creates a red sty when blocked by oil

Answer 12

Ciliary gland

Zeis

Question 13

Transparent mucus membrane lining the eyelids (palpebrael conjunctiva) and anterior surface of the eyeball (bulbar conjunctiva)

Answer 13

Conjunctiva

Question 14

Why are blood vessels underneath the eye visible when eye Is irritated
What is a special name for this irritated eye

Answer 14

Because conjunctiva is so thin

Blood shot

Question 15

Gland that drains tears to nasal cavity

Answer 15

Lacrimal

Question 16

What produces tears and is sent all the way through to the nasal cavity or down to your eye?

Answer 16

Lacrimal apparatus

Question 17

Nerve that secretes tears mediated by the parasympathetic fibers

Answer 17

Cranial nerve 7

Question 18

Allows us to follow a moving object and provides external support that helps maintain the shape of the eyeball and hold in the orbit

Answer 18

Extrinsic eye muscles

Question 19

What makes up the extrinsic eye muscles, they flow into a ring.

Answer 19

4 rectus muscles (inferior superior lateral and medial)
2 oblique (superior oblique and tendon)

Question 20

Muscles runs along medial wall of orbit, makes right then angle, passes through trochlea, innervates trochlear nerve
DEPRESSES AND LATERALLY

Answer 20

Superior oblique muscle

Question 21

Muscle that runs laterally and inserts on inferolateral

ELEVATES AND moves LATERALLY

Answer 21

Inferior oblique

Question 22

Has high axon to muscle fiver ratio

Answer 22

8-12 muscle cells for these motor units

Question 23

Moves laterally

Nerve: VI abducens

Answer 23

Lateral rectus

Question 24

Moves eye laterally

Nerve- III oculomotor

Answer 24

Medial rectus

Question 25

Elevates eye | Nerve- III oculomotor

Answer 25

Superior rectus

Question 26

Depresses eye | Nerve-III oculomotor

Answer 26

Inferior rectus

Question 27

Chambers of eye contain fluid called

Answer 27

Aqueous humor

Question 28

Lens is suspended by ciliary body by tiny filaments called

Answer 28

Suspensory ligaments | Or ciliary zonule

Question 29

Clear gel like material in posterior segment, supports shape of eyeball from inside

Answer 29

Vitreous humor

Question 30

We're optic nerve leaves eye

Answer 30

Optic disk

Question 31

Junction if retina with ciliary body

Answer 31

Ora serrata

Question 32

photoreceptors aka

Answer 32

Cones

Question 33

Site of attachment for muscles

Answer 33

Sclera

Question 34

What secretes the aqueous humor

Answer 34

Ciliary processes

Question 35

Muscles that extend out radially and make eye dilate

Answer 35

Pupillary dilator muscles

Question 36

Muscles contract eye

Answer 36

Pupillary constrictor

Question 37

Pupillary constrictor muscles stimulated by

Answer 37

Parasympathetic

Question 38

Pupillary dilatory stimulated by

Answer 38

Sympathetic

Question 39

Eyes medically rotate toward subject

Answer 39

Converge

Question 40

Work in dim light Best at detecting movement and peripheral vision 120 million in retina

Answer 40

Rod

Question 41

``` 10 million in retina Bright light Color vision High acuity vision Located in maxilla lures Central fovea only contains this ```

Answer 41

Cones

Question 42

Diff between rods and cones

Answer 42

Rods- work at night/ dim light | Cones- work during day or in bright light

Question 43

Visual pigment of rods

Answer 43

Rhodopsin (it's color is deep purple)

Question 44

Gradual loss of the accommodation reflex with age

Answer 44

Presbyopia

Question 45

Nearsightedness

Answer 45

Myopia

Question 46

Far sighted ness

Answer 46

Hyperopia

Question 47

Blurry images

Answer 47

Astigmatism

Question 48

Clouding of the lens | Like looking through glass

Answer 48

Cataract

Question 49

Failure to drain the eye results in excessive pressure in anterior chamber which compresses retina and optic nerve

Answer 49

Glaucoma