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Integrative NSC Exam 2 questions with actual answers.
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Integrative NSC Exam 2 questions withactual answers.
vestibular system is made up of ANS - -semicircular canals
-otolith organs (saccule & utricle)
linear motion is accounted for by
head rotation motion is accounted for by ANS - otolithic organs
semicircular canals
Hair cells in the 3 organs (saccule, utricle & canals) are... ANS - direction selective
Where is the cochlea located? ANS - organ of corti
Where is the otolith located? ANS - macula
Hair cells in the vestibular system are housed ANS - -macula (otoliths)
-cupula (semicircular canals)
What linear movement does utricle respond to ANS - horizontal movement (aka backward and
forwards)
hair cells in utricular macula are arranged by ANS - tallest cilla mirror each other
hair cells in saccular macula are arranged by ANS - smallest cilla mirror each other
What separates macula into halves ANS - striola
What head acceleration movement does the saccula respond to ANS - vertical movement
, Why do half hair cells depolarize and during backward acceleration the other half hyperpolarizes ANS -
striola splits the macula into halves
same in utricle and saccule
What type of active are vestibular neurons? ANS - tonically active (aka always active)
When cilla move toward the tallest to shortest they are ... ANS - depolarized
When cilla move away from tallest to shortest they are... ANS - hyperpolarized
What enters the cell leading to opening of voltage gated calcium channels to enter ANS - potassium
How does the endolymph flow in semicircular canals ANS - in the opposite direction of acceleration
stimulus
When angular acceleration goes to the right endolymph acceleration flows to the __ and causes the __
to fire ANS - left
right vestibular nerve
Describe the purpose of the otoconia ANS - provides mass and aids gravity by mechanically displacing
hair cells
What is the structure at the base of the semicircular canal (ampulla) that triggers hair cell activation due
to ANS - the cupula
endolymph displaces the cupula from acceleration
Hair cells in striola continuously fire during _____ head tilt and only stop once tilt ___ ANS - constant
forward head tilt; stops (resumes to standard position)
Tectorial membrane is important for ANS - audition
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