Unit 4

Question 1

Cochlea

Answer 1

Anterior Contains the sensory organs for hearing

Question 2

Semicircular Canals

Answer 2

Posterior Contains the sensory organs for balance

Question 3

Vestibule

Answer 3

Connects the cochlea and semicircular Canals Contains addtl sensory organs for balance`

Question 4

Dimensions of Cochlea

Answer 4

35mm long 5mm high 9mm wide at base

Question 5

Inner Ear Fluids: Perilymph

Answer 5

Fills outer, bony compartment High in Sodium

Question 6

Inner Ear Fluids: Endolymph

Answer 6

Fills inner, membranous compartment High in Potassium

Question 7

Traveling Wave Theory

Answer 7

by Gerog von Bekesy frequency is coded by place in the cochlea HIGH freqs cause more basilar membrane movement near base LOW freqs cause more movement at the apex

Question 8

Tonotopic Mapping

Answer 8

coding of frequency to a specific place along the basilar membrane HIGH freq coded at apex LOW freq coded at base

Question 9

Cochlea Compartments: Scala Vestibuli

Answer 9

Upper Compartment filled with PERILYMPH contains the oval window

Question 10

Cochlea Compartments: Scala Media

Answer 10

Middle Compartment filled with ENDOLYMPH