Neuro Section 5- Part 1

Question 1

What system is a bilateral receptor located in the inner ear?

Answer 1

Vestibular system

Question 2

What system information the brain about the position and motion of the head?

Answer 2

Vestibular system

Question 3

What system gives the sense of equilibrium and balance?

Answer 3

Vestibular system

Question 4

What system is composed of 3 semicircular ducts and the utricle and saccule?

Answer 4

Vestibular system

Question 5

What provides the brain with information about:
Static tilt of head
Linear and rotary acceleration of head

Answer 5

Vestibular system

Question 6

What does the displacement of the capsule in a given direction cause ALL the cilia to do?

Answer 6

Bend in the same direction

Question 7

What are the receptor units in the vestibular structures?

Answer 7

Hair cells

Question 8

What in the cilia open and cause depolarization?

Answer 8

Mechanosensitive K+ channels

Question 9

If cilia bend toward the kinoculium =

Answer 9

Depolarization

Question 10

If bending in the opposite direction =

Answer 10

Hyperpolarization

Question 11

Depolarization = increased or decreased frequency?

Answer 11

Increased

Question 12

Hyperpolarization = increased or decreased frequency?

Answer 12

Decreased

Question 13

What 2 parts of the vestibular system have the function of: rotary acceleration and deceleration of the head?

Answer 13

Ampulla of semicircular ducts

Question 14

What does NOT cause stimulation of crista ampullaris?

Answer 14

Constant rotational velocity

Question 15

What do the semicircular ducts prove the brain with?

Answer 15

Information about the direction and nature of head movements

Question 16

The semicircular ducts are on the opposite sides of the head but at the same plane= both move in ________ directions during rotary acceleration/deceleration

Answer 16

Opposite

Question 17

What is the receptor organ located in the utricle and saccule?

Answer 17

Macula

Question 18

What is the heavy and dense layer above the gelatinous layer that covers the cilia?

Answer 18

Otoliths

Question 19

What detects the linear acceleration/deceleration and static tilt of the head?

Answer 19

Otoliths

Question 20

What causes the otoliths to fall over by gravity and remain fallen over?

Answer 20

If the head tilts

Question 21

If the head tilts, the hair cells ____

Answer 21

Bend

Question 22

What makes otoliths lag behind producing a bending of the hair cells?

Answer 22

If the body moves in a linear direction

Question 23

What reflexes coordinate eye and head movements?

Answer 23

Vestibulo ocular reflexes

Question 24

Vestibulo-ocular reflexes- When the body moves, the eyes remain ______ on the organ field of vision for as long as possible

Answer 24

Fixed

Question 25

Medial longitudinal fasciculus —> Oculomotor, Trochlear, Abducens nuclei
Compensatory ___ movements in response to rotary acceleration/deceleration

Answer 25

Eye

Question 26

Cerebellum:
__________ communication

Answer 26

Reciprocal

Question 27

Cerebellum can _____-_____ the coordination of postural and oculomotor reflexes

Answer 27

Fine-tune

Question 28

Vestibulospinal tracts—> spinal cord:
__________ muscles in response to linear acceleration/deceleration

Answer 28

Antigravity