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PNB 2XB3 - Vestibular and Motor System Questions and Answers | Latest Update 2024/2025 CA$13.97   Add to cart

Exam (elaborations)

PNB 2XB3 - Vestibular and Motor System Questions and Answers | Latest Update 2024/2025

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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 What are the semicircular canals filled with? ~~> endolymph What is the vestibular labyrinth composed of? what are the functions of each? ~~> - utricle...

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  • September 20, 2024
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  • 2024/2025
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  • PNB 2XB3
  • PNB 2XB3
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1 | P a g e | © copyright 2024/2025 | Grade A+


PNB 2XB3 - Vestibular and Motor
System Questions and Answers |
Latest Update 2024/2025
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



What are the semicircular canals filled with?

✓ ~~> endolymph



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




Master01 | September, 2024/2025 | Latest update

, 2 | P a g e | © copyright 2024/2025 | Grade A+

striola

✓ ~~> the midline (a little groove) on the saccule and utricle



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 causes the transduction in

✓ ~~>



the 8th cranial nerve is composed of .... and ....

✓ ~~> auditory nerve and vestibular nerve



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



during a rotation, the inertia of the ... causes deflection of the capula

✓ ~~> endolymph



explain the adaptation that occurs during a rotation



Master01 | September, 2024/2025 | Latest update

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