HES 202 EXAM QUESTIONS AND ANSWERS LATEST
UPDATE
kinesthesia
the system for sensing the position and movement of individual body parts
semicircular canals
detect angular acceleration of the head
utricle and saccule
detect the linear acceleration of the head and position of the head in space
vestibular ganglion
The stimuli from the receptors are conveyed to the ...
vestibular labyrinth
a bony cavity located within the petrous portion of the temporal bone
semicircular canals
... are the three membranous channels located within the bony semicircular ducts of the
labyrinth
Anterior
canal located in the sagittal plane
Lateral
located in the transverse plane
Posterior
located in the frontal plane
ampulla
The terminal part of each canal ends with a dilation called the ..., which opens into the
vestibule
crista ampullaris
ampulla of each semicircular canal contains a cluster of mechanoreceptor cells called
the ...
hair cells
Each crista is composed of the special sensory receptor cells, called the ...
endolymph
the movements of this fluid stimulate the hair cells
Semicircular canals, Otoliths
Sensory receptors in inner ear
Hair cells
transform mechanical energy into neural activity
Kinocilium
what is 1?
Stereocilia
what is 2?
depolarizes
When stereocilia are pushed towards the kinocilium the hair cell
hyperpolarizes
, when they are pushed away the hair cell
depolarization, increased, excitation
what happens to the cell in stage one, and what is the corresponding nerve impulse
reaction?
Hyperpolarization, decreased, inhibition
what happens to the cell in stage two, and what is the corresponding nerve impulse
reaction?
kinocilium
respond to deflection by hyperpolarizing
stereocilia
respond to deflection by depolarizing
constant velocity
During periods of ... , the hair cells return to normal leakiness, and the 8th nerve
afferents return to baseline firing rates
nerve fibres
what is 1?
hair cells
what is 2?
gelatinous material
What is 3?
otoliths
What is 4?
horizontal
Utricle .... linear acceleration
vertical
Saccule ... linear acceleration
Linear acceleration is transduced in the
Maculae
Which sensory receptor is most sensitive to angular acceleration?
crista
Which of the following is correct regarding vestibular nuclei?
They are connected to the 3rd, 4th, and 6th cranial nerve nuclei by the medial
longitudinal fasciculus
Vestibular nuclei are projected only on to the cerebellum
False
how many vestibular nuclei are there?
4
Meniere's disease is associated with...
excess endolymph in the membranous labyrinth
depolarizes, increased
Bending the stereocilia toward the kinocilium ... the cell and results in ... afferent activity.
Bending the stereocilia away from the kinocilium ... the cell and results in a ... in
afferent activity.
hyperpolarizes, decrease
vestibulo-ocular reflex (VOR) controls ... to ... images during head movements
eye movements, stabilize
UPDATE
kinesthesia
the system for sensing the position and movement of individual body parts
semicircular canals
detect angular acceleration of the head
utricle and saccule
detect the linear acceleration of the head and position of the head in space
vestibular ganglion
The stimuli from the receptors are conveyed to the ...
vestibular labyrinth
a bony cavity located within the petrous portion of the temporal bone
semicircular canals
... are the three membranous channels located within the bony semicircular ducts of the
labyrinth
Anterior
canal located in the sagittal plane
Lateral
located in the transverse plane
Posterior
located in the frontal plane
ampulla
The terminal part of each canal ends with a dilation called the ..., which opens into the
vestibule
crista ampullaris
ampulla of each semicircular canal contains a cluster of mechanoreceptor cells called
the ...
hair cells
Each crista is composed of the special sensory receptor cells, called the ...
endolymph
the movements of this fluid stimulate the hair cells
Semicircular canals, Otoliths
Sensory receptors in inner ear
Hair cells
transform mechanical energy into neural activity
Kinocilium
what is 1?
Stereocilia
what is 2?
depolarizes
When stereocilia are pushed towards the kinocilium the hair cell
hyperpolarizes
, when they are pushed away the hair cell
depolarization, increased, excitation
what happens to the cell in stage one, and what is the corresponding nerve impulse
reaction?
Hyperpolarization, decreased, inhibition
what happens to the cell in stage two, and what is the corresponding nerve impulse
reaction?
kinocilium
respond to deflection by hyperpolarizing
stereocilia
respond to deflection by depolarizing
constant velocity
During periods of ... , the hair cells return to normal leakiness, and the 8th nerve
afferents return to baseline firing rates
nerve fibres
what is 1?
hair cells
what is 2?
gelatinous material
What is 3?
otoliths
What is 4?
horizontal
Utricle .... linear acceleration
vertical
Saccule ... linear acceleration
Linear acceleration is transduced in the
Maculae
Which sensory receptor is most sensitive to angular acceleration?
crista
Which of the following is correct regarding vestibular nuclei?
They are connected to the 3rd, 4th, and 6th cranial nerve nuclei by the medial
longitudinal fasciculus
Vestibular nuclei are projected only on to the cerebellum
False
how many vestibular nuclei are there?
4
Meniere's disease is associated with...
excess endolymph in the membranous labyrinth
depolarizes, increased
Bending the stereocilia toward the kinocilium ... the cell and results in ... afferent activity.
Bending the stereocilia away from the kinocilium ... the cell and results in a ... in
afferent activity.
hyperpolarizes, decrease
vestibulo-ocular reflex (VOR) controls ... to ... images during head movements
eye movements, stabilize
