Balance

Question 1

Sense organ for equilibrium

Saccule an utricle has one

Answer 1

Macula

Question 2

Monitors the position of head in space and plays role in posture

Answer 2

Maculae

Question 3

Reason for perpendicular and parallel macula

Answer 3

To detect linear acceleration and deceleration in vertical and horizontal plane

Question 4

Calcium carbonate crystals that are in the otolithic membrane

Answer 4

Otoliths

Question 5

These two project into the gelatinous otolithic membrane

Answer 5

Stereocilia (rodlike)
Kinocilium (thin rod with circle on top next to stereocilia)
THESE TWO MAKE HAIR CELLS

Question 6

Role of otoliths

Answer 6

Increase membranes weight and inertia (resistance to change in motion)

Question 7

Durin inertia, Otolithic membrane slides over __

When moving forward or backward

Answer 7

Hair cells

Question 8

Responds to changes in velocity if rotational movements of head

Answer 8

Cristae

Question 9

Bending cilia in opposite direction causes __ and reduces generation of impulses

Answer 9

Hyper polarization

Question 10

What happens when endolymph bends the cupula

Answer 10

Excited hair cells which depolarizes and sends impulses to brain at a faster rate

Question 11

Alternating eye movements (like chair spinning in lab)

Answer 11

Vestibular nystagmus

Question 12

Vestibular nystagmus happens because

Answer 12

Crista ampullaris is still bent after you stop

Question 13

Equilibrium receptors go directly go reflex centers in the

Answer 13

Brain stem

Question 14

Major integrative center for balance

Answer 14

Vesicular nuclei

Question 15

How do reflex eye movements help balance

Answer 15

Helps us remain focused on Visual field and quickly adjust our body position to maintain or regain balance