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Human Body Lab > Function of Ch. 11 > Flashcards

Function of Ch. 11 Flashcards

1
Q

eyebrow

A

each shades the eye

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2
Q

upper and lower eyelids

A

protect the eyes from injury, sunlight, and drying

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3
Q

eyelashes

A

shield the eyes

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4
Q

conjunctiva

A

produces mucous that prevents the eyes from drying

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5
Q

extrinsic eye muscles

A

moves the eyes, help maintain the shape of the eyes, and hold the eyes in the orbits

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6
Q

lacrimal gland

A

produces lacrimal secretions

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7
Q

lacrimal sac

A

passageway for tears

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8
Q

nasolacrimal duct

A

passageway for tears

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9
Q

fibrous tunic consists of

A

the sclera and the cornea

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10
Q

what protects internal structures, maintains the shape of the eyeball, provides a sturdy site for the attachment of extrinsic eye muslces, commonly called the white of the eye

A

sclera

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11
Q

cornea

A

refracts light

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12
Q

wha tis in the vascular tunic

A

iris, pupil, ciliary body, choroid

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13
Q

iris

A

regulates the size of a pupil; smooth muscle

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14
Q

pupil

A

passageway for light

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15
Q

ciliary body

A

regulates lens shape and secretes aqaueous humor; smooth muscle

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16
Q

choroid

A

absorbs light rays

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17
Q

produces signals in response to light

A

retina or nervous tunic

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18
Q

optic nerve

A

signals about vision travel along it to the optic chiasm

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19
Q

fibrous tunic is composed of what

A

dense connective tissue

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20
Q

optic nerve CNII

A

signals about vision travel along optic chiasm

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21
Q

lens

A

refracts light as it passes through ; avascular

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22
Q

aqueous humor

A

maintains intraocular pressure, eye shape, provides nutrition for the lens and cornea

23
Q

vitreous humor

A

transmits light, holds the retina against the choroid, contributes to intraocular pressure

24
Q

external ear consist of

A

auricle and acoustic meatus

25
Q

auricle

A

collects sound waves and directs them into the external acoustic meatus
-composed of skin and elastic cartilage

26
Q

external acoustic meatus

A
  • passageway for sound waves

- porton of tunnel is elastic cartilage other portion is bone both are lined with skin

27
Q

tympanic membrane

A
  • commonly called eardrum
  • connective tissue
  • sound waves cause it to vibrate which moves the auditory ausicles
28
Q

auditory ossicles

A

-amplify and transmit vibrations to the internal ear

29
Q

malleus

A
  • lateral ossicle
  • attaches to tympanic membrane
  • articulates with the incus
30
Q

incus

A

middle ossicle

-articulates with the malleus and stapes

31
Q

stapes

A

medial ossicle

-articulates with the incus and attaches to the oval window

32
Q

pharyngotympanic tube

A
  • opens when swallowing or yawning

- causes air pressure in the middle ear to be equal to the pressure of the atmospheric air

33
Q

bony labyrinth

A

vestibule, semicircular canal, cochlea

34
Q

vestibule

A

contains the membranous labyrinth

35
Q

oval window

A

transmits the vibrations of the ossicles to the perilymph

36
Q

semicircular canal

A

contain the membranous labyrinth

37
Q

cochlea

A

contains membranous labyrinth

38
Q

round window

A

a safety valve that prevents rupture of the cochlear duct

39
Q

scala vestibuli

A
  • upper tube
  • contains perilymph
  • part of the bony labyrinth
40
Q

vestibular membrane

A

separates the scala vestibule and the cochlear duct

-part of the bony labyrinth

41
Q

cochlear duct

A

middle tube

  • contains endolymph
  • part of the membranous labyrinth
42
Q

tectorial membrane

A

overlies the spiral organ

43
Q

spiral organ

A
  • sits on the basilar membrane

- sensory receptors for hearing are located here

44
Q

basilar membrane

A

separates the cochlear duct and scala tympani

45
Q

scala tympani

A

lower tube

  • contains perilymph
  • part of the bony labyrinth
46
Q

semicircular canal contains what

A

perilymph

47
Q

semicircular duct contains what

A

endolymph

48
Q

ampulla

A

contains the sensory receptors for equilibrium

49
Q

vestibule contains what

A

contains perilymph

50
Q

utricle is part of the _____ labirynth and contains what

A

membranous labyrinth

-contains endolymph and sensory receptors for equilibrium

51
Q

saccule; what labirynth and contains what

A
  • membranous

- contains endolymph and sensory receptors for equilibrium

52
Q

cranial nerve 8

A

carries signals from the inner ear to the brain

53
Q

vestibular nerve

A

carries signals from the utricle, saccule, and semicircular ducts to the brain

54
Q

cochlear nerve

A

carries signals from the cochlea to the brain

Human Body Lab (55 decks)

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