Term
| What structures constitute the outer ear? |
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Definition
Auricle (pinna)
Auditory canal |
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Term
| The opening of the auditory canal is called the ________ ______ ______. |
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Definition
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Term
| _____ _____ protect the outer end of the auditory canal. |
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Definition
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Term
| What type of glands line the auditory canal? |
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Definition
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Term
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Definition
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Term
| Where is the middle ear located? |
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Definition
| in the tympanic cavity of the temporal bone |
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Term
| What is the anatomic name for the eardrum? |
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Definition
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Term
| What are the structures of the middle ear? |
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Definition
tympanic membrane
auditory ossicles
auditory tube
Oval Window |
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Term
| What is the bony labyrinth? |
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Definition
| Osseus labyrinth, houses the inner ear. It is a maze of temporal bone passageways. |
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Term
| What is the funnel that channels sound waves to the tympanic membrane? |
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Definition
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Term
| The middle ear is designed to vibrate in ________. |
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Definition
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Term
| The _________ ear is designed to vibrate in fluid. |
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Definition
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Term
| Name the three bones of the middle ear in order of movement. |
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Definition
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Term
| Which inner ear bone is in contact with the tympanic membrane? |
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Definition
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Term
| Which inner ear bone is in contact with the oval window? |
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Definition
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Term
| The middle ear ________ sound waves. |
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Definition
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Term
| In order to hear, the _________ _______ must vibrate with enough force to move the fluid in the inner ear. |
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Definition
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Term
| What is the membranous labyrinth? |
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Definition
| the fleshy tubes that line the osseous labyrinth. |
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Term
| What fluid is the bony labyrinth filled with? |
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Definition
| perilymph, which is similar to CSF |
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Term
| Endolymph fills the ________ labyrinth. |
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Definition
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Term
| This type of lymph fluid is similar to K+ rich intercellular fluid. |
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Definition
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Term
| Endolymph and perilymph conduct _____ ____. |
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Definition
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Term
| Endolymph and perilymph respond to mechanical forces during changes in ________ ________ and ________. |
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Definition
| body positions and acceleration |
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Term
| What is the organ of hearing? |
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Definition
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Term
| The cochlea winds around a screw-like axix of spongy bone called the _________. |
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Definition
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Term
| Name the three fluid filled layers of the cochlea. |
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Definition
| scala vestibule, scala tympani and scala media (cochlear duct) |
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Term
| With what type of fluid are the scala vestibule and scala tymani filled? |
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Definition
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Term
| The scala vestibuli begins near what structure? |
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Definition
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Term
| The scala tympani ends at the ____ ____. |
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Definition
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Term
| The cochlear duct is also called the scala _______. |
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Definition
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Term
| The cochlear duct is separated from the scala vestibuli by the thin __________ _________. |
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Definition
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Term
| The cochlear duct is separated from the scala tympani by the __________ _________. |
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Definition
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Term
| Which is thicker the basilar membrane or the vestibular membrane. |
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Definition
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Term
| Where is the acoustic organ located? |
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Definition
| on the basilar membrane of the scala tympani |
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Term
| What comprises the acoustic organ? |
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Definition
| thick epithelium of sensory and supporting cells and associated membranes |
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Term
| In the organ of corti ________ ______ are covered with tectorial membrane |
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Definition
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Term
| In the organ of corti, different frequencies of vibration bend different parts of the __________ ________. |
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Definition
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Term
| When the basilar membrane moves it bends hair cells against the ________ _______. |
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Definition
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Term
| In the organ of corti, bending the hair cells ___________ the cell membrane. |
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Definition
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Term
| Auditory sensory neurons send nerve impulses up the _________ branch of the _________ nerve to the brain. |
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Definition
| cochlear branch of the vestibulochochlear |
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Term
| Hearing signals are ultimately transmitted to the __________ ________ in the temporal lobe. |
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Definition
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Term
| On the way to the auditory centers fibers cross for what reason? |
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Definition
| so you get impulses from each ear on both sides of the brain, protection process |
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Term
| What is the tympanic reflex. |
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Definition
| a hearing protection reflex that pulls malleus inward and stapes outward. |
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Term
| What are the muscles of the middle ear? |
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Definition
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Term
| In the tympanic reflex the ________ _______ pulls the malleus inward and the ________ pulls the stapes outward. |
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Definition
tensory tympani pulls malleus inward
stapedius pulls stapes outward |
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Term
| Is the auditory tube usually open or closed? |
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Definition
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Term
| Where are the valves to the auditory tube? |
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Definition
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Term
| When do the auditory tube valves open? |
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Definition
| chewing, swallowing and yawning |
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Term
| What part of the ear is responsible for equalizing pressure? |
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Definition
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Term
| Ascending to high altitudes makes pressure to the ear move _________. |
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Definition
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Term
| Ascending to high altitudes makes pressure to the ear move _________. |
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Definition
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Term
| Descending to high altitudes makes pressure to the ear move _________. |
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Definition
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Term
| Inflammation and swelling from colds/allergies may prevent the ________ ___________ from equalizing pressure. |
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Definition
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Term
| What is a treat repeated bouts of otitis medial. |
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Definition
| placing tympanostomy tubes in the tympanic membrane to allow the ears to drain |
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