Auditory System Flashcards
Middle Ear
Malleus, Incus, Stapes
Inner Ear
Cochlea
Directs sound into ear
Pinna
Allows sound to travel
External Auditory Canal
Function of Wax
Waterproof, Protection, Prevents growth of bacteria, and Prevents bugs from getting into the ear
Function of Ear Hair
Blocks insects and Feeling
Amplitude
Height, Loudness of a sound
Frequency
Cycles, The pitch of a sound
A part of the ear in which sound waves hit and creates a vibration and reproduces the frequency and form of the second wave
Tympanum (Ear Drum)
Outer Ear
Pinna, External auditory canal, Lobule
Function of Malleus, Incus, and Stapes
Amplify/ magnifies sounds
Ampulla
Detects motion
Utricle
Balances fluid due to horizontal motion
Saccule
Balances fluid due to vertical motion
Macula
Detects motion
Endolymph
A fluid that is located in the cochlea duct that contains high potassium
Perilymph
A fluid in the cochlea duct that contains low amounts of potassium
Otoliths
Stones in saccule and utricle that detect motion and resist against the fluids
Hair cells
Detects the motion
Cochlea
Transfers sound and vibrations into nerve impulses
Round Window
Absorbs the sound and takes away the echo
Oval Window
Let’s sound in from the stapes
Scala Vistibuli
Located in the cochlea
Cochlear Duct/ Scala media
Located in the cochlea that picks up the water vibrations that sends it to the nerves
Function of Malleus, Incus, and Stapes
Amplify/ magnifies sounds
Organ of Corti
Give nerve signals in response to sound vibrations
Outer Hair Cells
Push against tectorial membrane which allows to hear low sounds
Inner Hair Cells
Cells that project nerve signals to the brain
Eustachian tube
Drains out debris from the middle ear
