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26 True/False questions

  1. HelicotremaThe microscopic "hairs" of the hair cells extending through the reticular membrane. There are approximately fourteen cilia atop each hair cell.

          

  2. Round WindowThe membrane between the footplate of the stapes of the middle ear and the scala vestibuli of the inner ear.

          

  3. HearingThe process by which sounds are transmitted from the environment to our brains.

          

  4. PerilymphThe fluid in the cochlear duct.

          

  5. Oval WindowThe membrane separating the middle ear cavity from the scala tympani of the inner ear. The membrane is flexible and will be in opposite phase with the oval window when a tonal stimulus is present.

          

  6. Semicircular canalsThe membrane covering the hair cells, yet allowing the cilia to extend upward through it.

          

  7. PinnaThe external ear

          

  8. Apical EndFrom the Latin "apex" meaning tip or end. The small end in the center of the coil of the cochlea, the opposite end of the cochlear base.

          

  9. Stereophonic hearingThe eardrum

          

  10. CochleaThe microscopic "hairs" of the hair cells extending through the reticular membrane. There are approximately fourteen cilia atop each hair cell.

          

  11. OssiclesThe area in the base of the cochlea which translates between the semicircular canals and the cochlea.

          

  12. EndolymphA seawater-like fluid in the scala vestibuli, helicotrema and the scala tympani of the cochlea.

          

  13. Tectorial MembraneA membrane extending across the top of Corti's Organ. When the cilia are deformed by being compressed against this membrane, the hair cells stimulate the auditory nerve to "fire."

          

  14. Reticular MembraneThe membrane covering the hair cells, yet allowing the cilia to extend upward through it.

          

  15. Cochlear DuctA tube within a tube lying between the scala vestibuli and the scala tympani. It contains endolymph and houses the Organ of Corti. Along its lower wall is the basilar membrane. Its upper wall is Reissner's membrane.

          

  16. External Auditory MeatusThe lower level of the cochlea bordered by the helicorema at the apical end, the round window at the base, the cochlear wall and the basilar membrane. It is filled with perilymph.

          

  17. TransducerAn apparatus that converts one form of energy into another form. Mechanical energy (vibration) into electromagnetic signals. Ex. microphone.

          

  18. PerceptionA seawater-like fluid in the scala vestibuli, helicotrema and the scala tympani of the cochlea.

          

  19. Tympanic membraneThe eardrum

          

  20. Scala VestibuliThe upper level of the cochlea bordered by the oval window at its inception, the helicotrema at the apex, the cochlear wall, and Reissner's membrane. It is filled with perilymph.

          

  21. Eustachian tubeThe area in the base of the cochlea which translates between the semicircular canals and the cochlea.

          

  22. Basilar MembraneThe membrane which divides the scala tympani from the cochlear duct. It is this membrane which supports the Organ of Corti.

          

  23. Organ of CortiAn apparatus that converts one form of energy into another form. Mechanical energy (vibration) into electromagnetic signals. Ex. microphone.

          

  24. VestibuleThe hammer, anvil, and the stirrup: three small bones, each about the size of a grain of rice, through lever action, transmit and increase sound pressure as it travels through the middle ear.

          

  25. Scala TympaniThe lower level of the cochlea bordered by the helicorema at the apical end, the round window at the base, the cochlear wall and the basilar membrane. It is filled with perilymph.

          

  26. CiliaThe external ear