PNB 2XB3 - Vestibular and Motor System Questions And Answers Already Graded A+
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Course
PNB 2XB3 - Vestibular and Motor System
Institution
PNB 2XB3 - Vestibular And Motor System
What are the semicircular canals filled with? - ️️endolymph
what is the advantage of having high spontaneous firing rate even in the absence of tilt
in the hair cells of the vestibular system? - ️️tilting in the direction opposite to the
direction which causes maximal firing rate causes ...
PNB 2XB3 - Vestibular and Motor
System
What are the semicircular canals filled with? - ✔️✔️endolymph
what is the advantage of having high spontaneous firing rate even in the absence of tilt
in the hair cells of the vestibular system? - ✔️✔️tilting in the direction opposite to the
direction which causes maximal firing rate causes hyperpolarizing the cell
in which direction in regards to the striola do the longest stereocilia of the hair cells point
to? - ✔️✔️in utricle: all cells point towards the striola
in saccule: all cells point away from the striola
What is the vestibular labyrinth composed of? what are the functions of each? - ✔️✔️-
utricle and saccule: detect head tilt and linear acceleration
- semicircular canals: detect head rotation
What are the two otholith organs? - ✔️✔️saccule and utricle
macula - ✔️✔️receptor epithelium, a tissue on top of the utricle and saccule. Macula is
an area of the nervous system where there are receptors
striola - ✔️✔️the midline (a little groove) on the saccule and utricle
What causes the transduction in - ✔️✔️
the 8th cranial nerve is composed of .... and .... - ✔️✔️auditory nerve and vestibular
nerve
What are the three ways in which the head can rotate in? - ✔️✔️Yaw: z axis (saying
no)
Pitch: y axis (saying yes)
Roll: x axis
during a rotation, the inertia of the ... causes deflection of the capula - ✔️✔️endolymph
explain the adaptation that occurs during a rotation - ✔️✔️the endolymph catches up
with the speed of rotation, and so the capula is no longer deflected
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