Balance

Question 1

What is the VESTIBULAR COMPLEX composed of?

Answer 1

UTRICLE, SACCULE, and SEMICIRCULAR DUCTS

Question 2

What do the UTRICLE and SACCULE do?

Answer 2

Detect changes in position of head, detect linear acceleration e.g. car, elevator

Question 3

What do the SEMICIRCULAR DUCTS do?

Answer 3

Detect changes in rate of rotation

Question 4

What is a VESTIBULAR HAIR CELL?

Answer 4

20-50 STEREOCILIA, 1 KINOCILIUM

Question 5

What happens when the STEREOCILIA bend towards the KINOCILIUM?

Answer 5

Depolarization = An increased rate of AP

Question 6

What happens when the STEREOCILIA bend away from the KINOCILIUM?

Answer 6

Hyperpolarization = A decreased rate of AP

Question 7

What does the UTRICLE detect?

Answer 7

Movement of head away from verticle (bending), horizontal movement forwards, backwards, side-to-side

Question 8

What does the SACCULE detect?

Answer 8

Movement of head away from horizontal (getting up), vertical movement (jumping, elevator)

Question 9

What do the SEMICIRCULAR DUCTS detect?

Answer 9

Changes in rotational movement (spinning, turning)

Question 10

What can be found embedded in the AMPULLA?

Answer 10

HAIR CELLS

Question 11

What happens to the CUPULA when ENDOLYMPH moves?

Answer 11

It sways :)

Question 12

Where does balance take place?

Answer 12

Inner ear

Question 13

What structures are involved in balance?

Answer 13

VESTIBULAR NERVE, COCHLEAR NERVE, UTRICLE, SACCULE, SEMICIRCULAR CANALS

Question 14

does balance use a TONIC or PHASIC receptor?

Answer 14

TONIC

Question 15

What receptor cell is involved in balance?

Answer 15

HAIR CELL with KINOCILIUM

Question 16

What cause depolarization during the process of balance?

Answer 16

Gravity pulling on GEL MASS