Brainscape's Knowledge GenomeTM


Top Flashcards (Certified)
All Flashcards

NURS 242 > Chapter 14: Special Sense Organs > Flashcards

Chapter 14: Special Sense Organs Flashcards

1
Q

Receptors

A

sensory nerve endings that respond to stimulus

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Sense organs

A

eyes, nose, ears, mouth, skin

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Pupil

A

light enters here and the muscles of the iris constrict and dilate to regulate light exposure

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Iris

A

colored part of the eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Sclera

A

tough outer layer, white eyeball

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Accessory organs of the eye

A

muscle, fascia, eyebrows, eyelid, conjunctiva, lacrimal glands

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Conjunctiva

A

lines inner portion of eyelid and protects part of the eye that is exposed

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Lacrimal glands

A

produce and store tears

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Lacrimal ducts

A

tears pass through these small openings

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Nasolacrimal sac

A

connection between lacrimal and nasolacrimal

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Pathway of a tear

A 
produced in lacrimal glands
wash over eyeball
pass into lacrimal ducts
drain into nasolacrimal sac
pass into nasolacrimal duct for drainage
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Cornea

A

transparent film at front of eyeball that bends/refracts light to shift focus to proper receptor cell in eye

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Choroid

A

dark brown membrane inside sclera that is continuous with iris and ciliary body

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Ciliary body

A

surround outside of lens to allow for change in chape and thickness of lens
secretes acqueous humor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Refraction

A

flattening of lens (distant vision)

rounding of lens (close)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Accommodation

A

refractory adjustment for close vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Anterior chamber

A

area that contains acqueous humor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Vitreous chamber

A

filled with soft jelly material called vitreous humor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Escape of what fluid could cause considerable damage to eye

A

vitreous humor

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

Retina

A

nervous tissue membrane of the eye
continuous with optic nerve
enables vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Optic disc

A

region where optic nerve meets retina

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Which area of the eye does not contain light receptors?

A

optic disc

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Rods

A

responsible for peripheral vision
night vision
motion detection

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

Cones

A

three types function in bright light

color and central vision

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Most cases of color blindness affect which color receptor cones?
red and green
26
Daltonism
weakness in perceiving colors distinctly
27
Achromatic vision
total color blindness
28
Snellen chart
tests clarness or sharpness of vision normal vision is 20/20 top number is feet patient is standing from chart, bottom number is number of feet a normal person would be from the chart
29
Opthalmometer
instrument used to measure eye, specifically the cornea
30
Myopia
nearsightedness | parallel rays entering eye are focused in front of retina
31
Hyperopia
farsightedness inability of eye to focus on nearby objects rays of light brought to focus behind retina
32
Astigmatism
distortion of curvature of lens or cornea | results in uneven focusing
33
Tonometry
measurement of intraocular pressure, usually after numbing eye
34
Mydriatic
agent that dilates pupils
35
Presbyopia
hyperopia and impairment of vision due to age
36
Accommodation reflex
ability of eye to adjust to variations in distance
37
Fluorescein angiography
uses fluorescein to examine movement of blood through eye
38
Amblyopia
reduced vision in one eye not correctable by glasses corrected by eye patch aka strabismus
39
Blepharitis
inflammation of eyelid
40
Cataract
progressive condition of lens characterized by loss of transparency
41
Achromatopsia
profound inability to see color
42
Conjunctivitis
inflammation of the conjunctiva
43
Glaucoma
abnormal increased pressure in eye, which can cause damage to retina and optic nerve
44
Hordelum
sty
45
Macular degeneration
progressive deterioration of retina associated with new vessel fromation that can progress to blindness
46
Nyctalopia
poor vision at night or in dim light
47
Photophobia
excessive sensitivity to light
48
Ptosis
drooping of upper eyelid
49
Retinal detachment
separation of retina from choroid, usually from tear or hole in retina
50
Retinopathy
disease of the retina
51
Iridectomy
surgical removal of part of iris to allow for proper drainage in glaucoma patients
52
Cerumen
ear wax
53
How is the ear divided
external, middle, internal
54
External ear
visible part of ear | ends at tympanic membrane
55
Middle ear
air filled cavity containing ossicles
56
Internal ear
contains cochlea and semicircular canals
57
What are the ossicles in the middle ear
malleus incus stapes
58
What contains receptors for sense of balance?
semicircular canals
59
Semicircular canals
fluid-filled vanals that open into cochlea
60
Cochlea
spiral tunnel resembling snail shell
61
Eustachian tube
leads from middle ear to pharnx | can prevent damage to tympanic membrane by equalizing pressure
62
Otoscopic examination
examination of ear using otoscope
63
Audiologist
detects and evaluates hearing loss
64
Audiometer
electronic device for measuring hearing
65
Audiogram
record produced by audiometer
66
Deafness
inability to hear
67
Tuning fork test
Weber's test | tests auditory nerve and ability of ear structures to conduct sound waves to inner ear
68
Otitis
inflammation of ear
69
Otorrhea
may contain blood, pus, or spinal fluid
70
Otalgia
pain in the ear
71
Otitis media
inflammation of middle ear
72
Myringitis
inflammation of tympanic membrane
73
Mastoiditis
infection of one of the mastoid bones of the skull, usually extension of middle ear infection
74
Otitis externa
external ear infection often caused by fungus
75
Otomycosis
otitis externa
76
Otitis interna
inner ear infection
77
Otosclerosis
hardening of the ear
78
Tinnitus
noise in the ear | either from accummulation of cerumen or something more complex
79
Vertigo
dizziness
80
Cochlear implant
used in complete hearing loss | electrically stimulates cochlea
81
Otoplasty
srugical repair of the ear
82
Tympanostomy
surgical creation of opening in tympanic membrane to allow for drainage
83
Ceruminolytics
medications used to soften and break down ear wax
84
Nociceptors
pain receptors
85
Olfaction
sense of smell
86
Olfactory
pertaining to sense of smell
87
Anosmia
loss or impairment of sense of smell

NURS 242 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2025 Bold Learning Solutions. Terms and Conditions