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PNS Test 3 > Test 3 > Flashcards

Test 3 Flashcards

1
Q 
What is the "blind spot" of the eye?
A. The cona densa area 
B. The starting point of the optic nerve 
C. The rod densa area
D. A yellow area
A

B. The starting point of the optic nerve

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2
Q 
What fluid bathes the optic nerve?
A. CSF
B. Interstitial fluid
C. Perilymph 
D. Endolymph
A

A. CSF

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3
Q 
What type of photoreceptor is in the fovea centralis of the retina?
A. Cones
B. Rods
C. Bipolar neurons 
D. Ganglion cells
A

A. Cones

*side note: the fovea centralis is our sharpest field of view. Located in the center of the macula.

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4
Q 
Which fluid is in the scala tympani?
A. Ectolymph 
B. Mesolymph 
C. Perilymph 
D. Endolymph
A

C. Perilymph
*side note: Endolymph is in the scala media (between the scala tympani and scala vestibuli). Scala media has the Organ of Corti

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5
Q 
Which cranial nerve exits from the ventral side of the midbrain?
A. Oculomotor 
B. Trochlear 
C. Hypoglossal 
D. Trigeminal
A

A. Oculomotor

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6
Q 
What functional component is associated with smell?
A. GVA
B. SVE
C. GVE
D. SVA
A

D. SVA

special visceral afferent

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7
Q 
If the olfactory receptors are damaged, how long will it take to regain the sense of smell?
A. Year
B. Never
C. 6 Months 
D. 2 months
A

D. 2 months

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8
Q 
Which nucleus is the most lateral?
A. Dorsal motor nucleus of vagus
B. Nucleus of the solitary tract 
C. Dorsal cochlear 
D. Superior salivary
A

A. Dorsal motor nucleus of vagus

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9
Q 
What are the main output neurons from the olfactory bulb?
A. Purkinje
B. Mitral 
C. Periglomerular 
D. Granular
A

B. Mitral

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10
Q 
The ciliary body is in the same optic layer as...
A. The cornea 
B. The sclera
C. The choroid 
D. The retina
A

C. The choroid

*side note: the ciliary body make aqueous humor

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11
Q

Which of the following is false?
A. The fibers from the lateral half of the retina cross at the optic chiasm
B. The optic nerve exits the orbit through the optic canal
C. The fibers that are in the optic nerve are myelinated
D. The optic nerve is surrounded by the three meninges

A

A. The fibers from the lateral half of the retina cross at the optic chiasm

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12
Q 
Which cranial nerve innervates the inferior oblique muscle?
A. Trochlear
B. Abducens 
C. Oculomotor 
D. Optic
A

C. Oculomotor

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13
Q 
What is the outer rim of the pinna called?
A. Antihelix 
B. Tragus 
C. Antitragus 
D. Helix
A

D. Helix

*side note: the “pinna” is just a fancy way to say outer ear. AKA the “auricle”

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14
Q 
Where are the olfactory receptors (nerves)?
A. Glomerulus 
B. Entorhinal cortex
C. Olefactory bulb
D. Nasal epithelia
A

D. Nasal epithelia

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15
Q 
What structure gives your eyes color?
A. Pupil 
B. Iris
C. Cornea 
D. Sclera
A

B. Iris

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16
Q 
In what substance are the stereocilia of the spiral organ haircells embedded?
A. Tectorial membrane 
B. Otolithic membrane 
C. Perilymph 
D. Cupula
A

D. Cupula
*side note: the cupula is within the osseous ampullae of the semicircular canals. Stereocilia detect fluid motion within the canals which detects movement.

17
Q 
What is cranial nerve IX?
A. Trigeminal 
B. Glosspharyngeal 
C. Vagus 
D. Facial
A

B. Glosspharyngeal

18
Q 
The dorsal motor nucleus of the vagus is...
A. SSE
B. SVE
C. GVE
D. GSE
A

C. GVE

19
Q 
What cranial opening does the trochlear nerve pass through?
A. Foramen ovale 
B. Superior orbital fissure
C. Optic canal 
D. Inferior orbital fissure
A

B. Superior orbital fissure

20
Q 
Compensatory eye movement is stimulated by activating the...
A. Macula 
B. Christa 
C. Superior olive
D. Spiral organ
A

B. Christa
*side note: the christa (aka crista ampullaris), is a sensory organ located within the semicircular canals and is responsible for sensing angular acceleration and deceleration (causing eye movement).

21
Q 
Going up in an elevator is most likely to activate receptors in the...
A. Ampulla 
B. Utricle 
C. Organ of Corti 
D. Saccule
A

D. Saccule

*side note: the utricle detects acceleration in the horizontal plane (saccule = vertical plane)

22
Q 
Which cranial nerve exits caudal to the inferior colliculus?
A. Trochlear 
B. Facial 
C. Oculomotor 
D. Abducens
A

A. Trochlear

23
Q 
The ciliary ganglion lies lateral to which nerve?
A. Abducens
B. Oculomotor 
C. Ophthalmic 
D. Optic
A

D. Optic

24
Q 
Which extraocular motor nucleus is in the pons?
A. Oculomotor 
B. Abducens 
C. Edinger-Westphal 
D. Trochlear
A

B. Abducens

25
Q 
What foramina do the olfactory nerve fibers go through?
A. Foramen rotundrum 
B. Cribiform plate 
C. Foramen spinosum 
D. Foramen ovale
A

B. Cribiform plate

PNS Test 3 (1 decks)

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