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  1. Basilar Membrane
  2. Tympanic membrane
  3. Reticular Membrane
  4. Perception
  5. Stereophonic hearing
  6. Endolymph
  7. Round Window
  8. Cochlea
  9. Ossicles
  10. Pinna
  11. Apical End
  12. Cochlear Duct
  13. Transducer
  14. Organ of Corti
  15. Tectorial Membrane
  16. Helicotrema
  17. External Auditory Meatus
  18. Perilymph
  19. Scala Tympani
  20. Scala Vestibuli
  21. Semicircular canals
  22. Oval Window
  23. Vestibule
  24. Cilia
  25. Eustachian tube
  26. Hearing
  1. a The area in the base of the cochlea which translates between the semicircular canals and the cochlea.
  2. b Attached to the hearing apparatus, give feedback on balance.
  3. c The auditory canal which is approximately 1 inch in length and ends at the eardrum.
  4. d An apparatus that converts one form of energy into another form. Mechanical energy (vibration) into electromagnetic signals. Ex. microphone.
  5. e The 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.
  6. f The external ear
  7. g The membrane covering the hair cells, yet allowing the cilia to extend upward through it.
  8. h The 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.
  9. i The organ of hearing in the inner ear. It is a coiled tube within a tube, which transduces and encodes mechanical vibrations into electrochemical neurological signals.
  10. j The organ which contains about 23,500 hair cells. It is supported by the basilar membrane which, when deformed by pressure, stimulates the hair cells to trigger nerve impulses.
  11. k The eardrum
  12. l A 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."
  13. m A 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.
  14. n The microscopic "hairs" of the hair cells extending through the reticular membrane. There are approximately fourteen cilia atop each hair cell.
  15. o From 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.
  16. p A tube between the nasopharynx (throat) and the middle ear which keeps air pressure inside the middle ear equalized with that outside.
  17. q A narrow opening at the apical end of the cochlea joining the scala vestibuli from the scala tympani.
  18. r That portion of the hearing process which deals with the location of sounds in space by the use of our ears.
  19. s Sensory translations of environment signals
  20. t The membrane which divides the scala tympani from the cochlear duct. It is this membrane which supports the Organ of Corti.
  21. u A seawater-like fluid in the scala vestibuli, helicotrema and the scala tympani of the cochlea.
  22. v The fluid in the cochlear duct.
  23. w The membrane between the footplate of the stapes of the middle ear and the scala vestibuli of the inner ear.
  24. x The process by which sounds are transmitted from the environment to our brains.
  25. y The 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.
  26. z The 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.