Special Senses pt. 3

Question 1

3 anatomical subdivisions of the ear

Answer 1

external outer ear, middle ear, internal ear

Question 2

function of the external outer ear

Answer 2

collects sound waves and passes them inwards

Question 3

parts of the external outer ear

Answer 3

auricle (pinna), external auditory canal (meatus), tympanic membrane (eardrum)

Question 4

other name for the middle ear

Answer 4

tympanic cavity

Question 5

small, air-filled cavity in the temporal bones that is lined by epithelium

Answer 5

middle ear

Question 6

parts of the middle ear

Answer 6

auditory (Eustachian tube), ossicles (malleus, incus, stapes), oval window, round window

Question 7

the internal ear is aka

Answer 7

labyrinth

Question 8

2 main divisions of the internal ear

Answer 8

bony labyrinth, and membranous labyrinth

Question 9

3 areas of the bony labyrinth

Answer 9

semicircular canals, vastibule, cochlea

Question 10

which parts of the bony labyrinth contain receptors for equilibrium

Answer 10

semicircular canals and vestibule

Question 11

what part of the bony labyrinth contains receptors for hearing

Answer 11

cochlea

Question 12

bony labyrinth is lined with __ and contains a fluid called ____

Answer 12

periosteum; perilymph

Question 13

what fluid is found in the membranous labyrinth

Answer 13

endolymph

Question 14

auditory pathway

Answer 14

nerve impulses from the cochlear branch of the vestibulocochlear nerve > cochlear nuclei in the medulla > opposite side > midbrain > thalamus > auditory area of the temporal lobe of the cerebral cortex

Question 15

2 kinds of equilibrium

Answer 15

static and dynamic

Question 16

refers to the maintenance of the position of the body (mainly the head) relative to the force of gravity

Answer 16

static equilibrium

Question 17

maintenance of body position (mainly the head) in response to sudden movements such as rotation, acceleration and deceleration

Answer 17

dynamic equilibrium

Question 18

sense organs of static equlibrium

Answer 18

utricle and saccule

Question 19

primary sense organs of dynamic equilibrium

Answer 19

cristae

Question 20

what structures maintain dynamic equilibrium

Answer 20

3 semicircular ducts, saccule and utricle