Practice Quiz for Auditory and Vestibular Systems

1. Practice Quiz for Auditory and Vestibular Systems 20 October 2009

2. 1. What happens to the tympanic membrane at high altitudes if the Eustasian tubes are closed? It bows outward It does not move It bows inward It bursts It thickens

3. 2. Which of the following are components of the middle ear? Tympanic membrane Pinna Incus Cochlea Stapes Utricle

4. 3. Which cranial nerve innervates the organs of equilibrium? VII VIII IX X None of the above

5. 4. In the auditory system where are vibrations of air converted into vibrations of fluid? Malleus Oval window Eustacian tube Pinna Round window

6. 5. The attenuation reflex does not provide protection of inner ear structures in which situation(s)? Sudden, loud, high frequency sounds Continuous, loud, high frequency sounds Sudden, loud, low frequency sounds Continuous, loud, low frequency sounds

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

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

9. 8. Ossicles serve which of the following functions in the auditory system? Transmission Extermination Diffusion Detection Amplification None of the above

10. 9. Which of the following have high concentrations of potassium: The scalavestibuli The scala media The scala tympani The perilymph The endolymph

11. 10. Which of the following do NOT come into contact with endolymph? The cupula The tectorial membrane The scalavestibuli The scala tympani The processes of hair cells Reissner’s membrane

12. 11. What happens when potassium channels in stereocilia open? (choose all that apply.) Potassium flows in Potassium flows out Calcium channels open at the same time Calcium channels open shortly thereafter Depolarization of hair cells Increase in action potentials in hair cells

13. 12. Stereocilia of hair cells: Have mechanically-gated calcium channels Have mechanically-gated potassium channels Are true cilia Are bathed in endolymph Are long microvilli

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

15. 14. A human with normal auditory function can hear which of the following frequencies? 10,000 Hz 90 Hz 40 KHz 30 Hz 15 KHz

16. 15. Presbycusia is the age-related loss of the ability to Hear low frequency sounds Localize low frequency sounds Hear high frequency sounds Pay attention to what really matters.

17. 16. Which of the following is/are necessary for localizing the source of a sound? Cranial nerve X Eustacian tubes The Superior Olive Cranial nerve IX

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

19. 18. Which of the following is involved in detecting movement while riding an elevator? Movement of perilymph Movement of the cupula Movement of otoliths Semicircular canals

20. 19. Humans are better able to localize which of the following? High frequency sounds that vary in pitch Monotonous low frequency sounds A tug boat horn A bird chirping

21. 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 difficulty Detecting the source of a sound Determining whether the elevator was moving Determining whether the elevator was going up Determining which way is down.