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BBB: EXAM 3 Q&A SOLVED CORRECTLY TO PASS!!
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BBB: EXAM 3 Q&A SOLVED CORRECTLY TO PASS!!
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BBB: EXAM 3Q&A SOLVED
CORRECTLY TO
PASS!!
Evatee 10/20/24 BBB
,BBB: EXAM 3 Q&A SOLVED CORRECTLY TO
PASS!!
What physical dimension of sound waves is responsible for differences in
perception of pitch? Answer - frequency (Hz)
What physical dimension of sound waves is responsible for differences in
perception of loudness? Answer - Amplitude (intensity)
What physical dimension of sound waves is responsible for differences in
perception of timbre? Answer - Complexity
What are the ossicles? Where are they found? What is their function? Answer
- Ossicles are middle ear bones (MIS ossicles)
1.Malleus (hammer)
2. Incus (anvil)
3. Stapes (stirrup)
Found in middle ear
Function: transmit and strengthen vibrations (strengthens to move fluid in
inner ear)
Where is the cochlea located? In what section of the cochlea is the Organ of
Corti found? What takes place in the Organ of Corti? Answer - located: inner
ear
, section of cochlea its found in: scala media
what takes place:
sound waves move basilar membrane relative to tectorial membrane.
bends cilia.
produces receptor potentials
Explain the mechanism by which sound vibrations are transduced into receptor
potentials. In
your answer, include the following terms: basilar membrane, tectorial
membrane, hair cells, cilia,
tip links, insertional plaques, TRPA1 channels. Answer - 1. sound moves
basilar+tectorial membranes, bends cilia
2. Cilia are connected to one another by tip links. Insertional plaques are where
tip links attach. These insertional plaques trigger receptor potential.
3. Movement TOWARD tallest cilia STRETCHES fiber, OPENS TRPA1 ion channel.
K and Ca2 flow IN, DEpolarization occurs
4. Movement AWAY from tallest cilia RELAXES fiber, CLOSES TRPA1 channel.
HYPERpolarization occurs.
What is the difference between outer hair cells and inner hair cells? Answer -
INNER: detect and transmit to brain via auditory nerve
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