Nervous system 12.3

Question 1

what receptors are involved in hearing

Answer 1

mechanoreceptors

Question 2

what 3 regions is the ear divided into

Answer 2

1)outer ear
2)middle ear
3)inner ear

Question 3

outer ear contains (2)

Answer 3

1) pinna
2)Auditory Canal

Question 4

Pinna

Answer 4

Outside flap that capture and directs sound waves into the ear

Question 5

Auditory canal

Answer 5

Amplifies and directs sound to the tympanic membrane

Question 6

tympanic membrane

Answer 6

aka eardrum
vibrates when hit by sound waves

Question 7

ossicles (3)

Answer 7

melleus, incus-anvil and stapes

Question 8

ossicles

Answer 8

3 connected bones that transmit and amplify vibrations from tympanic membrane to oval window

Question 9

eustachian tube

Answer 9

connects middle ear to the pharynx and keeps air pressure equal on both sides of tympanic membrane

Question 10

round window

Answer 10

flexible membrane that reduces unwanted vibrations

Question 11

oval window

Answer 11

flexible membrane that picks up vibrations from stapes and transmits them to the fluid in the cochlea (signal generation)

Question 12

cochlea

Answer 12

coiled, fluid filled tube that transforms vibrations into nerve impulses

Question 13

organ of corti

Answer 13

functional unit inside the cochlea that contains hair cells to pick up vibrations between membranes

Question 14

2 membranes for hearing

Answer 14

basilar and tectorial

Question 15

Basilar membrane

Answer 15

hair cells attached pick up vibrations in cochlear fluid (hair cells move/vibrate)

Question 16

tectorial membrane

Answer 16

stereocilia attached to hair cells bend against membrane when basilar membrane flexes

Question 17

Auditory nerve

Answer 17

carries impulses from ear to brain

Question 18

semicircular canals

Answer 18

fluid filled loops contains mechanoreceptors to sense head and body rotation

Question 19

utricle gravitational equilibrium

Answer 19

forward/backward acceleration

Question 20

saccule gravitational equilibrium

Answer 20

up/down

Question 21

high frequencies stimulate____

Answer 21

Hair cells close to the oval widow

Question 22

low frequencies stimulate_____

Answer 22

hair cells far from the oval window

Question 23

noises above ____ damage hair cells

Answer 23

80 dB

Question 24

what receptors are involved in taste

Answer 24

chemoreceptors

Question 25

5 “tastes”

Answer 25

sweet, sour, bitter, salty, umami

Question 26

impulse of taste travels

Answer 26

brain stem- thalamus- gustatory (taste) center of parietal lobe

Question 27

taste and smell are___

Answer 27

highly linked

Question 28

what receptors are used for smell

Answer 28

chemoreceptors (olfactory cells)

Question 29

5 touch sensations

Answer 29

touch, heat, cold, pain, pressure

Question 29

flow of smell impulse

Answer 29

particles fit into olfactory cells like lock and key- generate AP- olfactory bulb in brain (temporal lobe)- emotional centers +frontal lobe

Question 30

what lobe is touch associated with

Answer 30

parietal lobe