Chapter 15 — Hearing

Question 1

original sound stimulus

Answer 1

soundwaves

Question 2

receptor of sound

Answer 2

mechanoreceptor (hair cell receptor)

Question 3

function of pinna

Answer 3

collects soundwaves and directs them into the auditory canal

Question 4

function of auditory canal

Answer 4

directs soundwaves onto tympanic membrane

Question 5

function of tympanic membrane

Answer 5

converts acoustic energy into mechanical energy

Question 6

3 auditory ossicles

Answer 6

malleus - incus - stapes

Question 7

2 functions of auditory ossicles

Answer 7

conduct mechanical energy produced by tympanic membrane to oval window—amplifies mechanical energy

Question 8

function of the Eustachian tube

Answer 8

regulates air pressure in middle air

Question 9

the Eustacian tube can…

Answer 9

collapse

Question 10

structes of the outer ear

Answer 10

pinna
auditory canal
tympanic membrane

Question 11

structures of middle ear

Answer 11

auditory ossicles

Eustachian tube

Question 12

structures of inner ear

Answer 12

cochlea
oval window
round window
organ of corti

Question 13

function of cochlea

Answer 13

houses structures of transduction of mechanical energy

Question 14

as fluid in the cochlea carries mechanical energy in a wavelike action, the _____ ______ moves against the _______ _______

Answer 14

basilar membrane; tectorial membrane

Question 15

how is mechanical energy transduced?

Answer 15

• fluid in cochlea carries mechanical energy
• basilar membrane moves up against tectorial membrane
• hair cell receptor cilia are distorted by contact with tectorial membrane
• distortion causes receptors to transduce mech. energy into a receptor potential

Question 16

function of basilar membrane

Answer 16

houses hair cell receptors and moves up and down against the tectorial membrane so cilia of receptors can be distorted

Question 17

function of organ of corti

Answer 17

houses hair cell receptors between two tubes of the cochlea

Question 18

_______ substances destroy hair cell receptors

Answer 18

ototoxic