Test 3 Flashcards
(25 cards)
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
B. The starting point of the optic nerve
What fluid bathes the optic nerve? A. CSF B. Interstitial fluid C. Perilymph D. Endolymph
A. CSF
What type of photoreceptor is in the fovea centralis of the retina? A. Cones B. Rods C. Bipolar neurons D. Ganglion cells
A. Cones
*side note: the fovea centralis is our sharpest field of view. Located in the center of the macula.
Which fluid is in the scala tympani? A. Ectolymph B. Mesolymph C. Perilymph D. Endolymph
C. Perilymph
*side note: Endolymph is in the scala media (between the scala tympani and scala vestibuli). Scala media has the Organ of Corti
Which cranial nerve exits from the ventral side of the midbrain? A. Oculomotor B. Trochlear C. Hypoglossal D. Trigeminal
A. Oculomotor
What functional component is associated with smell? A. GVA B. SVE C. GVE D. SVA
D. SVA
special visceral afferent
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
D. 2 months
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. Dorsal motor nucleus of vagus
What are the main output neurons from the olfactory bulb? A. Purkinje B. Mitral C. Periglomerular D. Granular
B. Mitral
The ciliary body is in the same optic layer as... A. The cornea B. The sclera C. The choroid D. The retina
C. The choroid
*side note: the ciliary body make aqueous humor
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. The fibers from the lateral half of the retina cross at the optic chiasm
Which cranial nerve innervates the inferior oblique muscle? A. Trochlear B. Abducens C. Oculomotor D. Optic
C. Oculomotor
What is the outer rim of the pinna called? A. Antihelix B. Tragus C. Antitragus D. Helix
D. Helix
*side note: the “pinna” is just a fancy way to say outer ear. AKA the “auricle”
Where are the olfactory receptors (nerves)? A. Glomerulus B. Entorhinal cortex C. Olefactory bulb D. Nasal epithelia
D. Nasal epithelia
What structure gives your eyes color? A. Pupil B. Iris C. Cornea D. Sclera
B. Iris
In what substance are the stereocilia of the spiral organ haircells embedded? A. Tectorial membrane B. Otolithic membrane C. Perilymph D. Cupula
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.
What is cranial nerve IX? A. Trigeminal B. Glosspharyngeal C. Vagus D. Facial
B. Glosspharyngeal
The dorsal motor nucleus of the vagus is... A. SSE B. SVE C. GVE D. GSE
C. GVE
What cranial opening does the trochlear nerve pass through? A. Foramen ovale B. Superior orbital fissure C. Optic canal D. Inferior orbital fissure
B. Superior orbital fissure
Compensatory eye movement is stimulated by activating the... A. Macula B. Christa C. Superior olive D. Spiral organ
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).
Going up in an elevator is most likely to activate receptors in the... A. Ampulla B. Utricle C. Organ of Corti D. Saccule
D. Saccule
*side note: the utricle detects acceleration in the horizontal plane (saccule = vertical plane)
Which cranial nerve exits caudal to the inferior colliculus? A. Trochlear B. Facial C. Oculomotor D. Abducens
A. Trochlear
The ciliary ganglion lies lateral to which nerve? A. Abducens B. Oculomotor C. Ophthalmic D. Optic
D. Optic
Which extraocular motor nucleus is in the pons? A. Oculomotor B. Abducens C. Edinger-Westphal D. Trochlear
B. Abducens