Chapter 7: Audition and Smell Flashcards Preview

Brain And Behavior > Chapter 7: Audition and Smell > Flashcards

Flashcards in Chapter 7: Audition and Smell Deck (18):
1

Cycles per Second

Hertz (Hz)

2

Pinna

earlobes, designed to funnel in the sounds into the external auditory canal

3

External auditory canal

leads to middle ear

4

Tympanic Membrane

thin piece of transparent tissue in between outer ear and inner ear; when ear molecules vibrate, they vibrate the eardrum

5

Hammer, Anvil, Stirrup

3 small bones connected by ligaments, vibrate to help sound travel

6

Oval Window

stirrup pushes against this, makes sweeping motion to push sound and move liquid in cochlea

7

round window

found next to oval window, similar function

8

cochlea

inner ear, fluid filler cavity where hearing actually occurs

9

Endolymph

fluid in middle chamber of cochlea

10

Perilymph

in outside chamber, filters of blood similar to water

11

Basilar membrane

is flexible to move up and down, stimulates hair cells

12

Tectorial Membrane

is rigid, doesnt move

13

Hair cells

auditory receptor cells

14

Inner hair cells

receive stimulation, move up and down by moving basilar membrane

15

Frequency theory

basilar membrane vibrates in conjunction to frequency of sound and action potentials are produced at the same rate of the vibration

16

Limitation of Frequency Theory

Refractory period limits maximum rate that an auditory nerve axon can produce action potentials

17

Original Place Theory

proposed that small portions of the basilar membrane vibrate in response to SPECIFIC frequencies

18

Traveling Wave Theory

An extention of place theory; difference frequencies cause different types of traveling waves in the chambers of the cochlea that maximally displace the basilar membrane at different regions