Lesson 5 - The Inner Ear & Auditory Pathways Flashcards
In a cross-section of the cochlea, the minimum number of rows of hair cells you can see is:
a. 6
b. 5
c. 4
d. 3
c. 4
The total number of neural fibers or neurons in the human auditory nerve is about:
a. 10,000
b. 20,000
c. 30,000
d. 40,000
c. 30,000
The basilar membrane separates:
a. the scala media and the scala vestibuli
b. the scala vestibuli and the scala tympani
c. the scala media and the scala tympani
d. the scala tympani and the semi-circular canals
c. the scala media and the scala tympani
The scala tympani is filled with:
a. strialymph
b. perilymph
c. endolymph
d. cortilymph
b. perilymph
The base of the cochlea:
a. begins at the oval window
b. is at the inner tip
c. consists of a low-frequency sounds
d. is wider than the apex
a. begins at the oval window
The fibers of the auditory nerve, at the point of maximum stimulation of the basilar membrane, discharging and recover and a rate of approximately:
a. up to 1Khz identical to the stimulus frequency
b. 3,000 times or cycles/sec
c. 500 times or cycles/sec
d. 250 times or cycles/sec
a. up to 1Khz identical to the stimulus frequency
The cochlea, acting as a frequency analyzer, distributes acoustic stimuli to places along the basilar membranes according to frequency. This forms the basis of a hypothesis called the:
a. critical band theory
b. square wave theory
c. Place theory
d. Fourier theory
c. Place theory
Each of the semi-circular canals:
a. are oriented at a 90° to one another
b. contain perilymph and endolymph
c. detect positioning and balance
d. all of the above
d. all of the above
Collections of nerve fibers are called:
a. ganglia and synapses
b. membrane and nuclei
c. ganglia and nuclei
d. ganglia and cortex
c. ganglia and nuclei
Afferent fibers:
a. transmit from the cochlea to the brain
b. transit from the brain to the cochlea
c. transmit from the middle ear the cochlea
d. transmit from the tympanum to the brain
a. transmit from the cochlea to the brain
