Reading...
Play button
Play button
Use LEFT and RIGHT arrow keys to navigate between flashcards;
Use UP and DOWN arrow keys to flip the card;
H to show hint;
A reads text to speech;
26 Cards in this Set
- Front
- Back
|
Sensory receptors are __
|
Hair cells located in the inner ear
|
|
|
Hair cells in the cochlea __
|
Detect vibration produced by sound waves
|
|
|
Hair cells in the vestibular system __
|
Respond to acceleration (motion and gravity)
|
|
|
Receptor potential
|
Stereocilia bend
|
|
|
-Increase or decrease secretion of neurotransmitter from the hair cell
-Frequency of action potentials in sensory neurons --> vestibulocochlear nerve |
Sensory transduction in hair cells
|
|
|
What are the three parts of the ear?
|
1. External ear
2. Middle ear 3. Inner ear |
|
|
Parts of the middle ear
|
Ear ossicles: malleus, incus, and stapes
|
|
|
Parts of the inner ear
|
Cochlea and cochlear duct
|
|
|
-Spiral bony tube, located within the temporal bone
-Contains perilymph (similar to ECF) -Connects to the middle ear (stapes) through the oval window |
Cochlea
|
|
|
-Inner tube within the cochlea, middle compartment b/w scala vestibuli and scala tympani
-Contains endolymph (high in K+) |
Cochlear duct
|
|
|
How does the sound pathway go?
|
External ear --> tympanic membrane --> ear ossicles --> oval window --> cochlea
|
|
|
List the structures of the cochlea
|
-Oval window
-round window -scala vestibuli -scala tympani -scala media -organ of Corti/spiral organ |
|
|
Little membranous, vibrations can be transmitted to perilymph
|
Oval window
|
|
|
Pressure release
|
Round window
|
|
|
Contains perilymph (parts of cochlea)
|
Scala vestibuli and scala tympani
|
|
|
Contains endolymph (part of cochlear duct)
|
Scala media
|
|
|
Parts of organ of Corti
|
-basilar membrane
-tectorial membrane |
|
|
supports hair cells
|
basilar membrane
|
|
|
moves stereocilia of hair cells
|
tectorial membrane
|
|
|
encoded by which portion of the basilar membrane vibrates
|
pitch
|
|
|
encoded by the frequency of action potentials
|
volume
|
|
|
two parts of the vestibular system
|
-semicircular canals
-utricle and saccule |
|
|
-detect rotational acceleration
-3 canals oriented in perpendicular planes to detect 3-dimensional motion -cupula - gelatinous membrane, bends hair cells when fluid moves in semicircular ducts |
semicircular canals
|
|
|
gelatinous membrane, bends hair cells when fluid moves in semicircular ducts
|
cupula
|
|
|
-detect linear acceleration and position with respect to gravity
-otoliths - "ear stones" attached to membrane, bend hair cells when head moves |
utricle and saccule
|
|
|
"ear stones" attached to membrane, bend hair cells when head moves
|
otoliths
|
