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PSYC 230 Unit 7 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass.
The roles of vestibular information in our daily life - Answer✔Vestibular signals involved in a
series of reflexes-balance and postural control, visual stability, regulation of blood pressure
Vestibular Spinal Reflex - Answer✔Allow you to stand up right and not fall over
-allows you to adjust balance for changes in posture
Visual Stability - Answer✔Making that when you move your head you can still see clearly
Regulation of Blood Pressure - Answer✔Adapting to how the position of your head affects
blood flow
Vestibular Autonomic Reflex - Answer✔Regulation of blood flow
What information does the vestibular system provide? - Answer✔-balance
-spatial orientation
Where is the vestibular system in the human body? - Answer✔The vestibular organs are in the
inner ear
-vestibular organs and the cochlea form the labyrinth of the inner ear
What are the vestibular organs? - Answer✔-in each ear there are three semicircular canals
(anterior, posterior, and horizontal) that sense rotational movements
-in each ear there is a utricle and saccule that form the otolith organs; these organs sense linear
acceleration and gravity
1|Page
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Vestibular organs and sensitivity to changes - Answer✔-detect changes in acceleration.
Movements of any amplitude in any direction will be detected (forward, backward, sideways,
upward, downward)
-they do not respond to constant velocity
Function of hair cells in the vestibular organs - Answer✔-vestibular organs contain hair cells
-they transduce the mechanical movements into neural energy
-each hair cell has stereocilia, the tallest one being called "kinocilium"
How vestibular organs work when the head is moving: Resting State - Answer✔When the head
is not moving; observed when stereocilia are not bent
-hair cells are stiff, and are always firing at a medium speed (90 spikes/sec)
How vestibular organs work when the head is moving: Depolarization (excitation) -
Answer✔Head is moving; observed when stereocilia bend in the direction of the kinocilium
-neurotransmitters are released
How vestibular organs work when the head is moving: Hyperpolarization (inhibition) -
Answer✔Head is moving; observed when the stereocilia bend in the direction opposite to the
kinocilium
-neurons becomes less active
Otolith organs - Answer✔Sense linear acceleration and gravity
Functions of anatomical facts of: Utricles - Answer✔Contains 30,000 hair cells that detect
changes in acceleration along the horizontal plane
-tell you which direction you are moving
Functions of anatomical facts of: Saccules - Answer✔Contains 15,000 hair cells that detect
changes in acceleration along the vertical plane
Functions of anatomical facts of: Otoconia - Answer✔Crystals laying on top of gelatinous layer
-follow your movements
Functions of anatomical facts of: Striola - Answer✔Band that determines the direction of the
kinocilium
2|Page
PSYC 230 Unit 7 Exam Questions And
Answers |Latest 2025 | Guaranteed Pass.
The roles of vestibular information in our daily life - Answer✔Vestibular signals involved in a
series of reflexes-balance and postural control, visual stability, regulation of blood pressure
Vestibular Spinal Reflex - Answer✔Allow you to stand up right and not fall over
-allows you to adjust balance for changes in posture
Visual Stability - Answer✔Making that when you move your head you can still see clearly
Regulation of Blood Pressure - Answer✔Adapting to how the position of your head affects
blood flow
Vestibular Autonomic Reflex - Answer✔Regulation of blood flow
What information does the vestibular system provide? - Answer✔-balance
-spatial orientation
Where is the vestibular system in the human body? - Answer✔The vestibular organs are in the
inner ear
-vestibular organs and the cochlea form the labyrinth of the inner ear
What are the vestibular organs? - Answer✔-in each ear there are three semicircular canals
(anterior, posterior, and horizontal) that sense rotational movements
-in each ear there is a utricle and saccule that form the otolith organs; these organs sense linear
acceleration and gravity
1|Page
, ©THESTAR 2025 ALL RIGHTS RESERVED 11:24 PM A+
Vestibular organs and sensitivity to changes - Answer✔-detect changes in acceleration.
Movements of any amplitude in any direction will be detected (forward, backward, sideways,
upward, downward)
-they do not respond to constant velocity
Function of hair cells in the vestibular organs - Answer✔-vestibular organs contain hair cells
-they transduce the mechanical movements into neural energy
-each hair cell has stereocilia, the tallest one being called "kinocilium"
How vestibular organs work when the head is moving: Resting State - Answer✔When the head
is not moving; observed when stereocilia are not bent
-hair cells are stiff, and are always firing at a medium speed (90 spikes/sec)
How vestibular organs work when the head is moving: Depolarization (excitation) -
Answer✔Head is moving; observed when stereocilia bend in the direction of the kinocilium
-neurotransmitters are released
How vestibular organs work when the head is moving: Hyperpolarization (inhibition) -
Answer✔Head is moving; observed when the stereocilia bend in the direction opposite to the
kinocilium
-neurons becomes less active
Otolith organs - Answer✔Sense linear acceleration and gravity
Functions of anatomical facts of: Utricles - Answer✔Contains 30,000 hair cells that detect
changes in acceleration along the horizontal plane
-tell you which direction you are moving
Functions of anatomical facts of: Saccules - Answer✔Contains 15,000 hair cells that detect
changes in acceleration along the vertical plane
Functions of anatomical facts of: Otoconia - Answer✔Crystals laying on top of gelatinous layer
-follow your movements
Functions of anatomical facts of: Striola - Answer✔Band that determines the direction of the
kinocilium
2|Page
