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Senses > External Ear > Flashcards

External Ear Flashcards

1
Q

ID the structure indicated by 1. & it’s function.

A

Auricle

It funnel pressure waves associated w/sound to the external auditory canal

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2
Q

ID the structure indicated by 4. & it’s function

A

Tympanic membrane.
Vibrates when sound waves reach it.

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3
Q

The middle ear is always an?

A

Air filled chamber

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4
Q

Function of middle ear?

A

amplify the pressure waves associated with sound before they get to the internal ears

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5
Q

What is the functional role of the tympanic membrane?

A

Vibrate in response of pressure waves(soundwaves) & transmits mechanical energy ( air ) in the auditory ossicles

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6
Q

I’d the structure indicate by 7. & function?

A

Cochlea. responsible for sound transduction which is hearing!

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7
Q

ID the structure indicated by 6.

A

Semicircular canals.

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8
Q

ID the structure indicated by 2. & function ?

A

Auditory ossicles.
Function: amplify sound signal

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9
Q

I’d the structure indicated by 5.

A

Oval window

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10
Q

ID the structure indicated by 11. & funtion

A

Eustachian tube.
1. Allows pressure to equalize between middle ear & external ear
2.Allows fluid to drain into the nasal pharynx

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11
Q

ID the structure indicated by K & function

A

Auricle/ Pinna

Made elastic cartilage and it collects sound and directs it into external acoustic meatus.

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12
Q

ID the structure indicated by j. & function

A

External acoustic meatus:
•Sound travels from the pinna to the tympanic membrane(ear drum)

•Modified aprocrine glands produce serum prevent insects getting in the ear

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13
Q

ID the structure indicated by I

A

Tympanic membrane.
•Thin membrane, vibrates when sound waves reach it
• separates external ear & middle ear

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14
Q

ID the structure indicated by H & function

A

Malleus.
Passes vibration from tympanic membrane to the incus

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15
Q

ID the structure indicated by E

A

Incus.
Passes vibration from malleus to stapes

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16
Q

ID the structure indicated by G.

A

Stapes
Passes vibration to the oval window

17
Q

ID the structure indicated by F & function

A

Eustachian tube/ auditory tube
• Drain fluid from the middle ear to the nasal pharynx
• equalize the pressure between middle ear & air outside

18
Q

ID the structure Indicated by 25

A

Malleus.
Passes vibrations from tympanic membrane to the incus

19
Q

Id the structure inducted by 26

A

Incus:
• passes vibration from the malleus to the stapes

20
Q

ID the structure indicated my the circle

A

Inner ear:
• vestibule
• semicircular canals
• cochlea

21
Q

ID the structure indicated by the blue pointer

A

Semicircular ducts filled with endolymph

22
Q

Function of crista ampullaris?

A

Able to detect dynamic equilibrium

23
Q

ID the structure indicated by the pointer

A

Vestibule.
filled with perilymph
•detects acceleration & deceleration

24
Q

ID the structure indicated by 3. & function

A

Oval window
Moves fluid witching the cochlea

25
Q

Where is round window located

A

Below oval window

26
Q

ID the structure indicated by C.

A

Vestibule.
Detects acceleration & deceleration of the head

27
Q

What’s are the 3 loops in the inner ear & their function is?

A

Semicircular canal filled with fluid & help maintain our sense of balance

28
Q

ID the structure indicated by A.

A

Cochlea.
Convert sound waves to a nerve impulse

29
Q

ID the structure indicated by the red pointer

A

Utricle
detect horizontal acceleration

30
Q

ID the structure indicated by the red pointer

A

Saccule
detects vertical acceleration

31
Q

ID the structure indicated by 1

A

Vestibular duct.
Filled with perilymph

32
Q

ID structure indicated by 7

A

Tympanic duct
Filled with perilymph

33
Q

ID the structure indicated by 2

A

Cochlear duct
Contains organ of corti & endolymph

34
Q

ID the structure indicates by 4

A

Vestibular membrane

35
Q

ID the structure indicated by the box

A

Organ of corti

36
Q

ID the structure indicated by 5

A

Basilar membrane.
Supports the organ of corti.

37
Q

ID the structure indicated by 3

A

Tectorial membrane
Keeps the hair cells in place

38
Q

ID the structure indicated by 8

A

Stereocilla.
Trigger action potentia

Senses (4 decks)

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