special senses Flashcards

1
Q

what does the eye do?

A

Receives light rays and transmits impulses from the rays to the optic nerve

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2
Q

conjunctiva

A

the mucous membrane, lines the eyelids

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3
Q

outermost layers of the eye

A

scerla, and the cornea

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4
Q

scerla

A

maintains the shape pf the eye, known as the white of the eye

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5
Q

cornea

A

allows light rays to pass through

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6
Q

middle layer of the eye

A

Choroids coat

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7
Q

choroids coat

A

interlaced with many blood vessels, nourishes the eye

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8
Q

intermost layer of the eye

A

retina, cones, rods

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9
Q

retina

A

transmits light impulse to the optic nerve

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10
Q

cones

A

It is sensitive to color, used mainly for vision when it is light,

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11
Q

rods

A

used for vision when it is dark or dim

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12
Q

iris

A

Located behind the cornea on the front of the choroids coat

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13
Q

pupil

A

opening center of the eye

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14
Q

Lens

A

Refracts light rays so the rays focus on the retina.

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15
Q

aqueous humor

A

fluid that fills the space between the cornea and iris, Helps maintain the forward curvature of the eyeball and refracts light rays

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16
Q

Vitreous Humor

A

Jellylike substances that fills the area behind the lens, Helps maintain the shape of the eyeball and also reflects lights

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17
Q

amblyopia

A

lazy eye

18
Q

astigmatism

A

abnormal shape of the cornea that causes blurred vision

19
Q

cataract

A

cloudiness of the lens

20
Q

conjunctivitis

A

pink eye

21
Q

glaucoma

A

a condition where there is an excess amount of aqueous fluid that causes blindness

22
Q

hyperopia

A

farsightedness

23
Q

colorblindness

A

genetic disorder where you cannot tell the difference between colors, can be helped with Enchroma glasses.

24
Q

Diabetic Retinopathy

A

An eye condition that damages the small blood vessels in the retina.

25
Q

myopia

A

nearsightedness

26
Q

Strabismus

A

When eyes do not move or focus together

27
Q

parts of the ear

A

pinna, auditory canal, tympanic membrane

28
Q

pinna

A

collects sound waves and transmits them to the ear canal

29
Q

auditory canal

A

Special glands that produce wax, sound waves travel through the auditory canal and goes through the tympanic membrane

30
Q

tympanic membrane

A

separates the middle ear from the outer ear

31
Q

small bones of the middle ear

A

malleus, incus, stapes

32
Q

inner ear

A

Separated from the middle ear by a membrane called oval window

33
Q

sections of the middle ear

A

vestibule, cochlea

34
Q

vestibule

A

acts as the entrance to the inner ear

35
Q

cochlea

A

transmits sound waves and controls balance

36
Q

semicircular canal

A

controls balance with liquid that moves along with the head and body

37
Q

Conductive hearing loss

A

occurs when the sound waves are not transmitted to the inner ear, causes extra wax, and rupturing of the tympanic membrane

38
Q

Sensory hearing loss

A

damage to the auditory nerve, cannot be cured, irreversible

39
Q

Meniere’s disease

A

results in a collection of fluid in the labyrinth of the ear, degeneration of the hair cells of the cochlea and the vestibule

40
Q

otitis externa

A

inflammation of the outer ear

41
Q

otitis media

A

inflammation of the middle ear

42
Q

Otosclerosis

A

a disorder of the middle ear bone, the stapes.