Practice Quiz for Auditory and Vestibular Systems

20 October 2009

1. What happens to the tympanic membrane at high altitudes if the Eustasian tubes are closed?a. It bows outwardb. It does not movec. It bows inwardd. It burstse. It thickens

2. Which of the following are components of the middle ear?a. Tympanic membraneb. Pinnac. Incusd. Cochleae. Stapesf. Utricle

3. Which cranial nerve innervates the organs of equilibrium?a. VIIb. VIIIc. IXd. Xe. None of the above

4. In the auditory system where are vibrations of air converted into vibrations of fluid?

a. Malleusb. Oval windowc. Eustacian tubed. Pinnae. Round window

5. The attenuation reflex does not provide protection of inner ear structures in which situation(s)?

a. Sudden, loud, high frequency soundsb. Continuous, loud, high frequency soundsc. Sudden, loud, low frequency soundsd. Continuous, loud, low frequency sounds

6. When a child has recurring bouts of _____, tube are surgically place in the _____.a. Pneumonia, tympanic membraneb. Otitis media, lining of the eustacian tubec. Dizziness, lining of the eustacian tubed. Otitis media, tympanic membranee. Ringing in the ears, round window

7. The frequency of action potentials codes in a spiral ganglion neuron (1st order sensory afferents) codes for:a. Wavelength of a soundb. Pitch if a soundc. Intensity of soundd. Loudness of a sounde. Frequency of a sound

8. Ossicles serve which of the following functions in the auditory system? a. Transmissionb. Exterminationc. Diffusiond. Detectione. Amplificationf. None of the above

9. Which of the following have high concentrations of potassium:

a. The scala vestibulib. The scala mediac. The scala tympanid. The perilymphe. The endolymph

10. Which of the following do NOT come into contact with endolymph?

a. The cupulab. The tectorial membranec. The scala vestibulid. The scala tympanie. The processes of hair cellsf. Reissner’s membrane

11. What happens when potassium channels in stereocilia open? (choose all that apply.)a. Potassium flows inb. Potassium flows outc. Calcium channels open at the same timed. Calcium channels open shortly thereaftere. Depolarization of hair cellsf. Increase in action potentials in hair cells

12. Stereocilia of hair cells:

a. Have mechanically-gated calcium channelsb. Have mechanically-gated potassium

channelsc. Are true ciliad. Are bathed in endolymphe. Are long microvilli

13. Acccording to the principle of tonotopy, lower frequencies are transduced toward the _______ of the cochleaa. Apex b. Base

14. A human with normal auditory function can hear which of the following frequencies?

a. 10,000 Hzb. 90 Hzc. 40 KHzd. 30 Hze. 15 KHz

15. Presbycusia is the age-related loss of the ability to

a. Hear low frequency soundsb. Localize low frequency soundsc. Hear high frequency soundsd. Pay attention to what really matters.

16. Which of the following is/are necessary for localizing the source of a sound?

a. Cranial nerve Xb. Eustacian tubesc. The Superior Olived. Cranial nerve IX

17. Low frequency sounds are localized by _____, while high frequency sounds are localized by _____.a. Attenuation of intensity, delay of arrivalb. Delay of arrival, delay of arrivalc. Attenuation of intensity, attenuation of

intensityd. Delay of arrival, attenuation of intensity

18. Which of the following is involved in detecting movement while riding an elevator?a. Movement of perilymphb. Movement of the cupulac. Movement of otolithsd. Semicircular canals

19. Humans are better able to localize which of the following?a. High frequency sounds that vary in pitchb. Monotonous low frequency soundsc. A tug boat hornd. A bird chirping

20. Suppose a person has a disorder which renders renders the utricles and saccules bilaterally non-functional. In a completely dark elevator, this person would have difficultya. Detecting the source of a soundb. Determining whether the elevator was

movingc. Determining whether the elevator was

going upd. Determining which way is down.