Anatomy final inner ear .txt

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kdalbor
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251898
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Anatomy final inner ear .txt
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2013-12-08 23:44:21
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inner ear
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anatomy
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  1. The entryway to the cochlea is termed ___
    Vestibule
  2. The inner ear houses the sensors for ___ & ___
    • Balance
    • Hearing
  3. The sensors for balance=
    The sensors for hearing=
    • Vestibular system
    • Cochlea
  4. Sensory organs are embedded within the ___ of the temporal bone
    Osseous (bony) canals
  5. The ___ connects the semicircular canals and the cochlea
    Osseous vestibule
  6. The oval window is within the lateral wall of the ____
    Vestibule
  7. The ____ house the sense organs for the movement of the body in space.
    Osseous semicircular canals
  8. Each ring of the osteosarcoma semicircular canals is in a place at right angles to other rings, so that ....
    The interaction of the 3 permits the brain to code 3-dimensional space.
  9. Hair cells in ampulla react to fluid movement in those___
    Planes
  10. Tilt to shoulder. Perpendicular to temporal bone length=
    Transverse plane of body. Shake head "no"=
    Nod "yes". Parallel to temporal bone length.=
    • Superior/ anterior semicircular canal
    • Lateral
    • Posterior
  11. The____ of the vestibular system contains the organs of balance
    Membranous labyrinth
  12. The 2 organs of balance
    • The cristae of the semicircular ducts
    • The macular of the utricle and saccule
  13. The___ has an appearance of a coiled snail shell
    Osteosarcoma cochlear labyrinth
  14. The Ossetia cochlear labyrinth coils out from its base near the vestibule, wrapping around itself ___ times before reaching its apex
    2 5/8
  15. The core of the osteosarcoma and a finely perforated bone
    Modiolus
  16. Modiolus is finely perforated for the___ nerve fibers
    VIIIth
  17. ___ is the central boney shelf
    Modiolus
  18. The core of the modiolus is continuous with the___ of the temporal bone
    Internal auditory meatus
  19. The labyrinth is divided into 2 incomplete chambers ,___&___, by an incomplete bony shelf protruding from the modulus called___
    • Scala vestibuli
    • Scala tympani
    • Osseous spiral lamina
  20. The region through which the scala tympani and scala vestibuli will communicate
    Helicotrema
  21. Houses the sensory organ for hearing
    Scala media
  22. Fluid that fills the scala vestibuli and scala tympani
    Perilymph
  23. The___ connects the upper duct and the subarachnoid space.
    Cochlear aqueduct
  24. Fluid in the cochlear duct
    Endolymph
  25. ___ is an extremely thin separation between the perilymph of the scala vestibuli and the endolymph of the scala media.
    Reissner's membrane
  26. It forms the floor of the scala media, separating the scala media and scala tympani.
    Basilar membrane
  27. It is on this membrane that the organ of hearing is found.
    Basilar membrane
  28. The hair cells on the modiolar side of the tunnel of corti are termed____
    Inner hair cells
  29. The 3500 inner hair cells form a single row stretching from the ___ to ____
    • Base
    • Apex
  30. __ hair cells are shaped like a tear drop
    Inner
  31. Inner hair cells have _____ innervation
    Many-to-one
  32. ___ hair cells are large, myelinated
    Inner
  33. 12000 hair cells from base to apex
    Outer
  34. ____ hair cells are shaped like a test tube
    Outer
  35. Outer hair cell innervation
    One-to-many
  36. ___ hair cells are mostly unmyelinated
    Outer
  37. Many fibers innervate each ___ hair cell, while many___ hair cells are innervated by one nerve fiber
    • Inner
    • Outer
  38. 1600 efferent fibers (away from brain)
    Outer hair cells
  39. ___fibers send messages from brain to ear
    Efferent
  40. Inhibits action in ear
    Efferent fibers
  41. Used to detect signals in background noise
    Efferent
  42. The___ can be thought of as a fluid-filled sac that rests within the cavity of the osseous labyrinth and is filled with ___
    • Membranous labyrinth
    • Endolymph
  43. __ forms the upper boundary of the scala media, and the basilar membrane forms the floor
    Reissner's membrane
  44. The ____ has 4 rows of hair cells resting on a bed of Deiters' cells for support
    Organ of corti
  45. The __ hair cells are separated from the ___ hair cell row by the ___
    • Outer
    • Inner
    • Tunnel of corti
  46. The upper surface of each hair cells is graced with a series of__
    Stereocilia
  47. Traveling wave peaks then rapidly falls off. The position of the peak is determined by ___
    Frequency of sound
  48. The oval window end of the basilar membrane is __, ___, ___ and responds to ___ frequencies
    • Stiff
    • Narrow
    • Less massive
    • Higher
  49. The apex of the basilar membrane is ___, ___, __, and responds to ___ frequencies
    • Less stiff
    • Wider
    • More massive
    • Lower
  50. Each frequency component of a sound (tono) causes maximal movement in a particular place (topic)
    Peak deflection
  51. Activity of hair cells will occur ___ at the deflection
    Back
  52. __ activity immediately after the deflection
    Little
  53. ___ is caused by the physical properties of basilar membrane
    Tonotopic organization
  54. Basal physical properties
    • Narrow
    • Stiff
    • Thick
    • High frequency
  55. Apical physical properties
    • Wide
    • Floppy
    • Thin
    • Low frequency
  56. Outer hair cell tips are embedded in ___
    Tectorial membrane
  57. Tectorial membrane has a different angle of movement than the basilar membrane that is caused by
    Different pivot points
  58. ___ hair cells do not make physical contact with the tectorial membrane
    Inner
  59. ___ overlays the hair cells and has functional significance in the processing of acoustic stimuli.
    Tectorial membrane
  60. It's proximity to the hair cells is an important contributor to hair cell excitation
    Tectorial membrane
  61. ___ hair cell movement is described as tectorial membrane and basilar membrane are not moving in parallel so distance between them changes and hair cells are sheared off
    Outer
  62. ___ hair cells have a smaller degree of movement caused by fluid flow. Moves hair cells like grass in river
    Inner
  63. More positive ions in ___
    Fewer positive ions ___
    • Endolymph
    • Inside cell
  64. Cells maintain a ___ mv resting potential
    150

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