smell, taste, hearing, balance Flashcards
what nerves contribute to special sense of taste
glossopharyngeal, vagus, facial
high frequency sound waves
short wavelength, high pitch
lower frequency sounds
long wavelength low pitch
3 ear bones in order
malleus, incus and stapes
hearing process in ear
1 auricle - funnel waves
2 external acoustic meatus - sound waves travel through
3 tympanic membrane - sound waves cause vibration
4 ear ossicles move (malleus, incus and stapes )
5 stapes moves oval window
6 oval window vibrates and produces waves in vestibule duct travel there to helicotrema to tympanic duct and then those waves vibrate the round window to dissipate noises
tympanic nerves from glossopharyngeal send _____ to _____ gland
parasympathetic to parotid gland
chordo tympani pass through what in the ear
between the malleus and incus
the vestibule is made of what
utricle adn succle – provide info about linear acceleration
utricle senses
horizontal acceleration
saccule senese
veterical accelration
semicircular canals sense
rotational or angular accelration
in the utericle and saccule (vestibule) the sterocilia do what
embeed to membrane and increase its mass (membrane moves, stereocilia move)
in hair cells what causes depolarization
depolarization = bending to tallest cells=open ion channels
hyperpolarization of hair cells
bends away from tallest, closin gion channels