Ear Anatomy Quiz

1. Which structure forms the boundary between the external ear and the middle-ear cavity?

2. Which cranial nerve carries both hearing and balance information from the inner ear to the brain?

3. Which inner-ear structure contains the spiral chambers involved in hearing?

4. A diagram labels the fluid inside the cochlear duct and the membranous semicircular ducts. Which fluid is being identified?

5. A person turns their head quickly from side to side. Which structures primarily detect the resulting angular acceleration?

6. After pressure waves travel through the cochlea, which membrane-covered opening helps release that pressure into the middle ear?

7. During an examination, an otoscope is moved inward from the opening of the ear toward the eardrum. Through which passage does it travel?

8. Which sequence lists the auditory ossicles from lateral to medial?

9. Earwax completely blocks the external acoustic meatus, preventing sound from reaching the tympanic membrane effectively. Which part of the auditory pathway is directly obstructed?

10. Which pair of structures lies within the vestibule and helps detect linear acceleration and head position relative to gravity?

11. Which visible structure collects sound and directs it toward the ear canal?

12. Damage is localized near the base of the cochlea, close to the oval window. Which sounds are most directly represented in this region?

13. Where are the sensory hair cells responsible for converting cochlear vibrations into neural signals located?

14. Vibrations have passed through the malleus and incus. Which structure normally transmits them next to the oval window?

15. A passenger feels pressure in the middle ear during an airplane descent. Which structure normally helps equalize this pressure with the nasopharynx?

16. A small middle-ear muscle contracts and limits movement of the stapes during the acoustic reflex. Which muscle is it?