Ear Flashcards
____ transmits sounds into neurological signals
Cochlea
The organ of corti is housed in the _____
Cochlea
What portion of the external ear functions to direct sound to the external auditory meatus?
Auricle
What portion of the ear amplify sounds?
Tympanic membrane
_____ detect linear motion, speed, and head tilt
Semicircular duct and canal
_____ is the duct to CSF in the ear
Cochlear aqueduct
____ stops transmission of louds sounds to protect the ear
Tensor tympani
The ____ tube goes from middle ear to nose
Pharyngotympanic tube
The scala tympani holds ____
perilymph
The cochlear duct holds ____
endolymph
95% of _____ cells send frequency translation
Inner hair cells
The ____ and ___ detect linear motion and head tilt
Saccule and Utricle
What are the 2 maculae?
Saccule and Utricle
Are low frequencies sent to the earlier or later cochlea?
Earlier
Are high frequencies sent to the earlier or later cochlea?
Later
_____ are ear stones
Otoliths
Where mechanical energy is translated into neurologic information
Organ of Corti
_____ is similar to extra cellular fluid high Na+
Perilymph-
_____ is similar to intra cellular fluid high K+
Endolymph-
_____ cells are in a single row, receive 95% of nerve fibers from cochlear nerve (afferent) 10-20 neurons fer hair cell; less but more important
Inner Hair cells
_____ cells: Efferent and afferent nerve fibers, may act as cochlear amplifier, source of otoacoustic emissions; more but less important
Outer Hair cells
