Exam 1 Special Senses: Hearing and Equilibrium

Question 1

? collectively called the auditory ossicles (3)

Answer 1

incus, malleus, stapes

Question 2

? sacs found within the vestibule; sites of the maculae (2)

Answer 2

utricle, saccule

Question 3

? vibrates at the same frequency as the sound waves hitting it; transmits the vibrations to the ossicles

Answer 3

tympanic membrane

Question 4

? fluid contained within the membranous labyrinth

Answer 4

endolymph

Question 5

? fluid contained within the bony labyrinth

Answer 5

perilymph

Question 6

? grains of calcium carbonate in the maculae

Answer 6

otoliths

Question 7

? location of the spiral organ

Answer 7

cochlear duct

Question 8

? involved in equalizing the pressure in the middle ear with the external air pressure

Answer 8

pharyngotympanic tube

Question 9

? positioned in all 3 special planes

Answer 9

semicircular ducts

Question 10

? gelatinous cap overlying hair cells of the crista ampullaris

Answer 10

ampullary cupula

Question 11

? transmits the vibrations of the stapes to the fluid in the scala vestibulis

Answer 11

oval window

Question 12

? hair cells of the spiral organ rest on this membrane

Answer 12

basilar membrane

Question 13

? contains the crista ampullaris

Answer 13

ampulla

Question 14

? acts as a pressure relief valve for pressure waves in the scala tympani

Answer 14

round window

Question 15

? gelatinous membrane overlying in the hair cells of the spiral organ

Answer 15

tectorial membrane

Question 16

? can result from the fusion of the ossicles

Answer 16

conduction deafness

Question 17

? can result from a lesion on the cochlear nerve

Answer 17

sensorineural deafness

Question 18

? sound heard in one ear but not in the other during bone and air conduction

Answer 18

sensorineural deafness

Question 19

? can result from otitis media

Answer 19

conduction & sensorineural deafness

Question 20

? can result from impacted cerumen or a perforated eardrum

Answer 20

conduction deafness

Question 21

? can result from a blood clot in the primary auditory cortex

Answer 21

sensorineural deafness