7. SENSORY EAR

Question 1

external ear

Answer 1

recieves and collects sound waves
frequency (pitch) and amplitude (volume)

Question 2

in the middle ear sound waves go from ___ to ___

Answer 2

air to fluid

Question 3

inner ear

Answer 3

fluid movement

Question 4

in the inner ear soundwaves are transduced to where?

Answer 4

nerve impulses in the CNS

Question 5

parts of the inner ear

Answer 5

cochlea
vestibule
fluid filled compartment

Question 6

cochlea (spiral)

Answer 6

associated with hearing

Question 7

vestibule organ & semi circular canal

Answer 7

associated with equilibrium, linear & gravity

acceleration and balance (rotational movement)

Question 8

do sound waves travel faster through liquids?

Answer 8

yes

Question 9

where is the inner ear embedded

Answer 9

in the skull temporal lobe

Question 10

bony labrinth (inner ear)

Answer 10

cavity in bone

Question 11

membranous labyrinth (inner ear)

Answer 11

fluid filled with endolymph (rich in potassium)

Question 12

vestibular organs

Answer 12

saccule, utricle and semicircular ducts

Question 13

what is the spiral shape of the cochlea for?

Answer 13

compact length

Question 14

vestibular maculae

Answer 14

sensory areas of membrane labyrinth

Question 15

utricle and saccule

Answer 15

important for detecting gravity and movement of endolymph

Question 16

what is endolymph used for?

Answer 16

detecting linear acceration

Question 17

support cells

Answer 17

for structural integrity, maintain environment for hari cells, remove damaged hair cells

Question 18

otoliths

Answer 18

calcium carbonate concretions
add weight to gelatin matrix

Question 19

what are kinocilium and stereocilia?

Answer 19

apical projections in vestibular maculae

Question 20

semicircular duct ampullae and cristae are essential for detecting what?

Answer 20

rotational movement
- angular acceleration, rotational movement

Question 21

sectioned cochlea

Answer 21

determines which wavelength is detected

Question 22

spinal ganglion

Answer 22

contain cell bodies of bipolar neurons

Question 23

what are inner hair cells of spiral organ of corti important for?

Answer 23

improving sensitivity

Question 24

what are inner hair cells of spiral organ of corti important for?

Answer 24

sound transduction to electrical signal

Question 25

three cell types of spiral organ of corti

Answer 25

1. outer hair cell
2. inner hair cell
3. supporting cells

Question 26

hair cells

Answer 26

mechanotransduction (sound movement to electrical signal to CNS for processing)