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Anatomy and Phsiology Lab > Ear > Flashcards

Ear Flashcards

1
Q

Three divisions of the ear

A

Outer ear

Middle ear

Inner ear

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2
Q

Outer ear parts

A

Auricle

External auditory canal

Tympanic membrane

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3
Q

Auricle

A

Acts as a funnel for sound wave
(The ear)

Made of elastic cartilage

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4
Q

External auditory canal

A

Passageway through bone into the head

Contains ceruminious glands

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5
Q

Ceruminous glands

A

Modified sweat glands that secrete ear wax inside the external auditory canal

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6
Q

Tympanic membrane

A

The ear drum

Vibrates when struck by sound wave

Separates the outer and middle ear regions

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7
Q

Middle ear region parts

A

Cavity in skull’s temporal bone

Eustachian tube

Auditory ossicles

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8
Q

Eustachian (auditory) tube

A

Diagonal tube that connects middle ear to superior region of nasal cavity

Equalizes pressure

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9
Q

Auditory ossicles

A

Three tiny bones that vibrate when struck by sound waves

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10
Q

Auditory ossicle names

A

Malleus

Incus

Stapes

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11
Q

Malleus

A

Attaches to medial surface of tympanic membrane

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12
Q

Incus

A

Vibrates when struck by malleus

Median of the ossicles

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13
Q

Stapes

A

Vibrates when struck by incus and leads to inner ear region

Smallest of ossicles

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14
Q

The inner ear

A

Spiral shaped passageways deep in the ear

Neuron rich area that stimulates cranial nerve VII

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15
Q

Cranial nerve VII

A

Vestibulocochlear nerve

Terminated in brains temporal lobe

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16
Q

Cochlea

A

The spiral shaped bone in the inner ear

17
Q

Three fluid filled membranes of the cochlea:

A

Cochlear duct

Scala tympani

Scala vestibuli

18
Q

Cochlear duct

A

Triangular chamber that contains organ of corti

19
Q

Organ of corti

A

Protrusion/bump inside the cochlea duct

Small elevation of neurons

20
Q

Tectorial membrane

A

Finger like membrane next to the organ of corti

21
Q

What attaches the organ of corti and tectorial membrane?

A

Cilia

22
Q

Scala tympani

A

Chamber inside cochlea that shares wall with organ of corti

23
Q

Scala vestibuli

A

Chamber in cochlea that shares wall with opposite side of organ of corti

24
Q

Opening in the cochlea bone that allows stapes vibrations to pass through:

A

Oval window

25
Q

What causes stimulation of cranial nerve VIII

A

Cilia movement in the organ of corti

26
Q

Opening responsible for absorbing displacement of the three fluid membranes

A

Round window

27
Q

Semicircular canals location

A

Inside inner ear.
Anterior canal is the most superior one

Posterior canal

Horizontal canal

Anatomy and Phsiology Lab (10 decks)

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