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Flashcards in Balance Deck (16):
1

What is the VESTIBULAR COMPLEX composed of?

UTRICLE, SACCULE, and SEMICIRCULAR DUCTS

2

What do the UTRICLE and SACCULE do?

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

3

What do the SEMICIRCULAR DUCTS do?

Detect changes in rate of rotation

4

What is a VESTIBULAR HAIR CELL?

20-50 STEREOCILIA, 1 KINOCILIUM

5

What happens when the STEREOCILIA bend *towards* the KINOCILIUM?

Depolarization = An increased rate of AP

6

What happens when the STEREOCILIA bend *away* from the KINOCILIUM?

Hyperpolarization = A decreased rate of AP

7

What does the UTRICLE detect?

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

8

What does the SACCULE detect?

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

9

What do the SEMICIRCULAR DUCTS detect?

Changes in rotational movement (spinning, turning)

10

What can be found embedded in the AMPULLA?

HAIR CELLS

11

What happens to the CUPULA when ENDOLYMPH moves?

It sways :)

12

Where does balance take place?

Inner ear

13

What structures are involved in balance?

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

14

does balance use a TONIC or PHASIC receptor?

TONIC

15

What receptor cell is involved in balance?

HAIR CELL with KINOCILIUM

16

What cause depolarization during the process of balance?

Gravity pulling on GEL MASS