Vestibular and Auditory System

Question 1

Auricle (pinna)

Answer 1

Directs sound wave to external acoustic canal

Question 2

External acoustic canal

Answer 2

Passageway for sound to reach the middle ear

Question 3

Tympanic membrane (eardrum)

Answer 3

Vibrates when hit by sound waves, transmits sound to middle ear

Question 4

Oval (vestibular) window

Answer 4

Covered by the stapes, allows for transmission of sound energy from middle ear to inner ear

Question 5

Round (cochlear) window

Answer 5

Covered by the secondary tympanic window, acts as an outlet for pressure waves created in the fluid of inner ear by the movement of stapes in response to sound

Question 6

Mastoid air cells

Answer 6

Enhance or inhibit the reception of sound waves depending on wavelengths, regulates pressurePh

Question 7

Pharngotympanic/auditory/eustachian tubes

Answer 7

Connects the middle ear to the nasopharynx, allows pressure equilibrium

Question 8

Bones (malleus, incus, stapes)

Answer 8

Transmit sounds from tympanic membrane to oval window to inner ear

Question 9

Muscles (tensor tympani, stapedius)

Answer 9

Hold the bones of the ear in place and modify bones to transmit sound

Question 10

Vestibule saccule and utricle

Answer 10

Membraneous sacs within the vestibule that detect gravity and changes in linear motion

Question 11

Semicircular canals (anterior, posterior, lateral)

Answer 11

Canals oriented on different axes, containing crista ampullares that detect changes in linear motion

Question 12

Cochlea (vestibular, tympanic, and cochlear ducts)

Answer 12

A network of ducts that transmit pressure waves to organ of corti