HEARING part II

Question 1

oval central portion of the bony labyrinth

Answer 1

vestibule

Question 2

vestibule contains 2 sacs:

Answer 2

• utricle - little bag
• saccule - little sac

Question 3

*the walls of the utricle and saccule contain thickened regions called
- STATE EQUILIBRIUM

Answer 3

maculae

Question 4

maculae contains 2 kinds of cells

Answer 4

• hair cells - sensory receptors
• supporting cells

Question 5

the supporting cells secrete thick, gelatinous glycoprotein layer called

Answer 5

otolithic membrane

Question 6

the otolithic membrane is covered by

Answer 6

otoliths

Question 7

Semicircular Canals- 3 tubes/canals named based on their position

Answer 7

anterior
posterior
lateral

Question 8

One end of each canal enlarges into

Answer 8

ampulla (saclike duct)

Question 9

small elevation in the ampulla

Answer 9

cristae

Question 10

receptor for DYNAMIC EQUILIBRIUM

Answer 10

cristae

Question 11

THE AMPULLA CONTAINS’

Answer 11

• HAIR CELLS
• SUPPORTING CELLS: covered by cupula

Question 12

a mass of gelatinous material displaced by
fluid movement within the semicircular canals

Answer 12

cupula

Question 13

• Series of sacs and tubes found inside the bony labyrinth
• Contains the oval & round windows

Answer 13

inner portion/membranous labyrinth

Question 14

the membranous labyrinth contains what fluid

Answer 14

endolymph

Question 15

• it is associated with the VESTIBULE and involved in evaluating the position of
  the head in relation to gravity

Answer 15

static equilibrium

Question 16

• it is associated with the SEMICIRCULAR CANALS and
  involved in evaluating the changes in the rate of head movement

Answer 16

kinetic/dynamic equilibrium

Question 17

– responses to changes in the position of the head due to gravity

Answer 17

righting reflex