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Exam (elaborations)

SHS 311 EXAM 2A QUESTIONS WITH ALL CORRECT ANSWERS

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SHS 311 EXAM 2A QUESTIONS WITH ALL CORRECT ANSWERS What does the Auditory nerve do? - Answer- Transmits neural code for sound to the brainstem What does the inner ear do? - Answer- Transduction of sound vibration into the neural code What is the outer (external) ear do? - Answer- -directs so...

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  • November 7, 2024
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  • SHS 311
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SHS 311 EXAM 2A QUESTIONS WITH
ALL CORRECT ANSWERS

What does the Auditory nerve do? - Answer- Transmits neural code for sound to the
brainstem

What does the inner ear do? - Answer- Transduction of sound vibration into the neural
code

What is the outer (external) ear do? - Answer- -directs sound to the middle ear
-amplifies sound in frequency, depends on specific manna on location pf sound source

What does the middle ear do? - Answer- -it matches the impedance diff. b/t air and
fluids/tissues of the inner ear
-protection of inner ear and direct stimulation of IE

What does the Pinna do? - Answer- Provides cues for sound location

What are 2 functions of the Middle ear? - Answer- 1. Effectively deliver sound vibration
to inner ear fluids
2. To help prevent inner ear from being overdriven by strong vibrations

What are the 3 Ossicles? What order? - Answer- 1. Malleus
2. Incus
3. Stapes

What structure of the Middle ear is the BIGGEST? Which is the SMALLEST? - Answer-
BIGGEST: Malleus
smallest: Stapes

What connects the Tympanic Membrane to the Inner Ear? - Answer- Ossicles connect
the Tympanic Membrane to the oval window of the inner ear

A cross-section of the cochlea is like a tube divided into 3 sections... What are these
three sections? - Answer- From bottom to top;
Scala Vestibuli
Scala Media
Scala Tympani

, A cross-section of the cochlea is like a tube divided into 3 sections... Which one
contains the sensory cells that transduce vibration into neural impulses? - Answer-
Scala Media contains the sensory and supporting cells

What are the "hair like" structures that give the hair cells their name? - Answer-
Stereocilia (Cilia)

Where do the 2 Scalas meet? - Answer- Helicotrema

How many turns are in the Cochlea? - Answer- 2 1/2

The Cochlear has 3 chambers... What are they? - Answer- 1.Scala Vestibuli
2. Scala Media
3. Scala Tympani

What 2 cavities is the inner ear divided into? - Answer- 1. One houses the organ of
BALANCE
2. Houses the organ of HEARING

Where is the inner ear situated? and what is it protected by? - Answer- 1. skull
2. Temporal bone

What are the general differences of the size of each b/t the base and apex? - Answer-
Basilar membrane is wider at the apex than it is at the base, while the cochlea becomes
smaller from base to apex.

What structure supplies the basic metabolic energy for the cochlea? - Answer- STRIA
VASCULARIS

What is the function of the Cochlea? - Answer- Transduces sound vibrations into neural
signals
-These neural signals code for frequency, intensity and phase of sound.

What is a traveling wave? - Answer- Motion of the basilar membrane in which the
location of MAXIMAL VIBRATION is frequency dependent



What function does the Pinna provide? - Answer- Filters sound so that the spectrum of
sound depends on the location of sound source

What is the approximation frequency range for the peak of the total outer-ear canal
resonance? - Answer- 2000-6000 Hz

The Tympanic Membrane moves more in the middle part that is connected to the
Manubrium. What is this phenomenon called? - Answer- Buckling

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