Sensory Systems: Vestibular

Question 1

Roll

Answer 1

x-axis rotation

Question 2

Pitch

Answer 2

y-axis rotation

Question 3

Yaw

Answer 3

z-axis rotation

Question 4

Labyrinth

Answer 4

Converts effects of gravity into neural impluses

Question 5

Utricle and Saccule respond to _____ of the head and static head position relative to ground.

Answer 5

linear accelerations (forward/backward)

Question 6

3 semicircular canals specialized to _____ for head turning.

Answer 6

encode rotation

Question 7

Vestibular nerves are _____.

Answer 7

tonically active

Question 8

Hair cells in the _____, _____, and _____ are selective for certain directions

Answer 8

ampulla
saccule
utricle

Question 9

The Otolith (Ear stone) organs:

Answer 9

Utricle

Saccule

Question 10

Small crystals sit in the _____ of the Utricle and Saccule.

Answer 10

gelatinous layer (otholitic membrane)

Question 11

The crystals in the Utricle and Saccule are acted on by gravity to activate _____.

Answer 11

hair cells

Question 12

Hair bundle movement occurs _____ in response to tilting of the head.

Answer 12

tonically

Question 13

Hair bundle movement occurs _____ in response to acceleration.

Answer 13

transiently

Question 14

Hair cells sit in the _____ of each canal, encapsulated by _____.

Answer 14

ampulla

gelatinous cupula