Biology Questions and Answers
vibrate. The incus then causes the
stapes to vibrate.
- What are the elements that
constitute the internal ear?
What are the functions of
those structures?
In the internal ear there are the cochlea
and the semicircular canals. Ththat fills the cochlea receives vibratione fluid (^)
from the ossicular chain of the middle
ear and transmitssemicircular canals. the pressure to th Within the e
semicircular canals the pressure
variation othe hair cells of these structures.f the filling fluid moves cilia The of
hair cells then generate action
potentials that are transmitted to thbrain through the auditory nerves. e
- Why is there a sense of
pressure change inside the ear
when someone goes down a
mountain?
The pressure imaintained equal to thnside the middle ear ise external ear (so (^)
to the exterior too) due to a
communicating dear and the pharynx uct between the middlecalled the auditory
tube, or Eustachian tube. When
someone goes down a mopressure upon the middle ear increasesuntain the air
and it is necessary to do some exercises
like fake swallowing to fopening of the pharyngeal oriorce thefice of the (^)
auditory tuagain. be to equalize the pressure
- What is the vestibular
system? How does it operate?
The vestibular system is the part of the
ear that paregulation ofrticipates the equilibrium of in the control anthe bodyd (^)
(balance).
The semicircular(internal) ear are perpendicularly place canals of the inner (^) d
and detect changes in the gravitationalposition of the head (this is another
sensorial function of the inner ear,
besides auditory perceptiohead rotates the pressure n). Whof the fluiden the
within the canals upon the cilia of
specific receptor cells varies acells generate action potentialsnd these
transmitted by the vestibulocochlear
nerve. The neural impinterpreted by the brain as informationulse is then (^)
about thhead. e gravitational position of the
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