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organs of special senses and endocrine systems > Physiology Of Hearing > Flashcards

Physiology Of Hearing Flashcards

1
Q

What are sound waves

A

Anything that vibrates in an elastic medium

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2
Q

What is infrasound

A

Sounds below frequency of perception

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3
Q

What is ultrasound

A

Sounds above the frequency of perseption

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4
Q

What is sound frequency measured in

A

Hz

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5
Q

What is sound transduction

A

Vibrations from tympanic membrane to inner ear via ossicles

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6
Q

Which ossicle is bound to the tympanic membrane

A

Malleus

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7
Q

What binds the incus and malleus

A

Minute ligament

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8
Q

Where does the stapes lie

A

At the membranous labyrinth

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9
Q

How do cochlear impulses get transmitted

A

By cochlea nerve (branch of vestibulocochlear nerve)

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10
Q

Describe the structure of the cochlea

A

Coiled labyrinth with 3 fluid filled chambers: Scala vestibuli, Scalia media, Scala tympani

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11
Q

What fluid filled the Scala vestibuli

A

Perilymph

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12
Q

What fluid fills the scala media

A

Endolymph

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13
Q

Where does the scala vestibuli start and end

A

Starts at oval window, ends ar round window

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14
Q

Which is the upper canal

A

Scala vestibuli

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15
Q

How is the scalar vestibuli deprecated from the scala media

A

Reinsers membrane

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16
Q

How is the scala media separated from the scala tympani

A

Basement membrane

17
Q

What is the tectorial membrane

A

Extracellular matrix that stands the length of the cochlea

18
Q

what is the organ of corti

A

The sensory region of the cochlear between the Calgary tympani and scalar media

19
Q

What are sensory hairs called

A

Stereocili

20
Q

What region of the ear is responsible for balance

A

Semi-circular Canals
Otolith organs (aka utricle and suckle) (just below semicircular canals)

21
Q

Which otolith organ senses horizontal acceleration

A

Utricle

22
Q

What otolith organ senses vertical acceleration

A

Saccule

23
Q

How is balance sensed

A

The vestibular system (semicircular canals + otolith organs)
contain endolymph and gel containing CaCO3 crystals
Stereocili hairs move in the gel to sens

24
Q

What do semicircular canals detect

A

Angular acceleration

organs of special senses and endocrine systems (16 decks)

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