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A&P 2 > Special Senses (visual system) > Flashcards

Special Senses (visual system) Flashcards

1
Q

What does this system include

A 
Vision
Hearing
Balance
Taste
Olfaction
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2
Q

___ is our dominant sense

A

Vision

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3
Q

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

A

Occipital

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4
Q

5 components of visual system

A 
Lacrimal apparatus
Palpebrae (eye lids)
Conjunctiva 
Glands
Extrinsic eye muscles
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5
Q

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

A

Eye brows

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6
Q

This protects eye and keeps them from drying out

A

Eye lid (palpebrae)

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7
Q

Space between upper and lower lids

A

Palpebrae fissure

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8
Q

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

A

Sensory receptora

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9
Q

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

A

Lacrimal caruncle/ medial commissure

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10
Q

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

A

Tarsal plates

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11
Q

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

A

Tarsal/ Meibomian glands

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12
Q

Gland that creates a red sty when blocked by oil

A

Ciliary gland

Zeis

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13
Q

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

A

Conjunctiva

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14
Q

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

A

Because conjunctiva is so thin

Blood shot

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15
Q

Gland that drains tears to nasal cavity

A

Lacrimal

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16
Q

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

A

Lacrimal apparatus

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17
Q

Nerve that secretes tears mediated by the parasympathetic fibers

A

Cranial nerve 7

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18
Q

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

A

Extrinsic eye muscles

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19
Q

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

A 
4 rectus muscles (inferior superior lateral and medial)
2 oblique (superior oblique and tendon)
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20
Q

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

A

Superior oblique muscle

21
Q

Muscle that runs laterally and inserts on inferolateral

ELEVATES AND moves LATERALLY

A

Inferior oblique

22
Q

Has high axon to muscle fiver ratio

A

8-12 muscle cells for these motor units

23
Q

Moves laterally

Nerve: VI abducens

A

Lateral rectus

24
Q

Moves eye laterally

Nerve- III oculomotor

A

Medial rectus

25
Q

Elevates eye

Nerve- III oculomotor

A

Superior rectus

26
Q

Depresses eye

Nerve-III oculomotor

A

Inferior rectus

27
Q

Chambers of eye contain fluid called

A

Aqueous humor

28
Q

Lens is suspended by ciliary body by tiny filaments called

A

Suspensory ligaments

Or ciliary zonule

29
Q

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

A

Vitreous humor

30
Q

We’re optic nerve leaves eye

A

Optic disk

31
Q

Junction if retina with ciliary body

A

Ora serrata

32
Q

photoreceptors aka

A

Cones

33
Q

Site of attachment for muscles

A

Sclera

34
Q

What secretes the aqueous humor

A

Ciliary processes

35
Q

Muscles that extend out radially and make eye dilate

A

Pupillary dilator muscles

36
Q

Muscles contract eye

A

Pupillary constrictor

37
Q

Pupillary constrictor muscles stimulated by

A

Parasympathetic

38
Q

Pupillary dilatory stimulated by

A

Sympathetic

39
Q

Eyes medically rotate toward subject

A

Converge

40
Q

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

A

Rod

41
Q 
10 million in retina
Bright light
Color vision 
High acuity vision
Located in maxilla lures
Central fovea only contains this
A

Cones

42
Q

Diff between rods and cones

A

Rods- work at night/ dim light

Cones- work during day or in bright light

43
Q

Visual pigment of rods

A

Rhodopsin (it’s color is deep purple)

44
Q

Gradual loss of the accommodation reflex with age

A

Presbyopia

45
Q

Nearsightedness

A

Myopia

46
Q

Far sighted ness

A

Hyperopia

47
Q

Blurry images

A

Astigmatism

48
Q

Clouding of the lens

Like looking through glass

A

Cataract

49
Q

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

A

Glaucoma

A&P 2 (14 decks)

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