Chapter 6 Hearing and Taste

Question 1

pinna

Answer 1

outer ear

fleashy part

Question 2

tympanic membrane

Answer 2

middle eaar
eardrum
vibrates at same freq as sound waves that hit it

connects to:
mallus (hammer)
incus (anvil)
stapes (stirrup)

Question 3

oval window

Answer 3

membrane of inner ear

Question 4

cochlea

Answer 4

fluid filled membrane containing hair cells
base higher freqs
apex lower freqs

Question 5

ossicles

Answer 5

mallus (hammer)
incus (anvil)
stapes (stirrup)

Question 6

hair cells

Answer 6

on the basliar membrane

when displaced by vibrations in the fluid of the cochelea they excite cells of the auditory nerve

Question 7

place theory

Answer 7

basliar membrane resembles strings of a piano

each area a different frequency

Question 8

frequency theory

Answer 8

basliar membrane vibrates in syncrany with a sound causing auditory nerve axons to produce action potentials at the same freq
ex 50hz 50 AP

Question 9

conductive deaffness

Answer 9

mid ear deafness

prevents mid ear from transmitting to cochelea

Question 10

nerve deafness

Answer 10

inner ear deafness

damage to cochlea, hair cells, or auditory nerve

Question 11

tinnitus

Answer 11

frequent or consitant ringing in ears

Question 12

semicircular canals

Answer 12

filled with a jelly like substance and lined with hair cells
accel of head stimulates hairs that transmit info to brainstem and cerebellum

Question 13

somatosensory system

Answer 13

sensation of body and its movements

Question 14

pacinian corpuscle

Answer 14

detects sudden displacements/high freq vibrations on the skin

Question 15

capscicin

Answer 15

stimulates receptor of painful heat (found in peppers)

Question 16

dermatome

Answer 16

limited area of body where each spinal nerve connects to

Question 17

labelod-line principle

Answer 17

each receptor responds to a limited range of stimuli

meaning depends on which neurons are active

Question 18

olfaction

Answer 18

sense of smell

Question 19

olfactory cells

Answer 19

neurons responsable for smell
located on nasal canal
cilia: thread-like dendrites (hairs)

Question 20

vomeronasal organ (VNO)

Answer 20

set of receptors located near but separate from the olfactory receptors

respond only to pheromones