T8.2: Special Senses - Ear Flashcards
The membranous labyrinth contained within the vestibule includes (MG)
A. Utricle only
B. Saccule only
C. Both utricle and saccule
D. Utricle and saccule are in the semicircular canal, not the vestibule
C. Both utricle and saccule
Stereocilia are _____ and made of _____.
Kinocilium are _____ and made of _____. (MG)
A. motile, actin; non-motile, microtubules
B. non-motile, actin; motile, microtubules
C. motile, microtubules; non-motile, actin
D. non-motile, microtubules; motile, actin
B. non-motile, actin; motile, microtubules
There are lots of metabolic and congenital causes of cataracts. Which drugs can cause them? (MG)
A. Barbituates B. Benzo's C. Haloperidol D. Corticosteroids E. A & B F. C & D G. All of the above
F. C & D
Haloperidol and corticosteroids are known to cause cataracts when used frequently and in high doses
A scientist is looking at the tympanic membrane under a microscope. Which kind of epithelium will he see on the inner side?
A. Stratified Squamous
B. Simple Squamous
C. Simple Columnar
D. Simple Cuboidal
RFA
Ans. D Simple Cuboidal
The patient comes to the doctor he has suffered from loss of hearing in his right ear. After examination it is found that there is damage to the bony labyrinth and it is leaking fluid. What is true of this fluid?
A. Low in Na and High K
B High in Na and High K
C High in Na and Low K
D. similar in composition to intracellular fluid
RFA
Ans. C. High in Na and Low in K- the fluid being examined is Perilymph which is found in the Bony labyrinth, and resembles extracellular fluid and CSF
A & D. are characteristic of Endolymph which is the fluid of the membranous labyrinth.
Jeff throws up whenever he rides an elevator. What is super sensitive in Jeff?
A. Utricle
B. Organ of Corti
C. Incus
D. Saccule
RFA
Ans. D Saccule- part of the macule and is related to vertical motion
A. Utricle- is also part of the macule but it is related to horizontal motion
B. Organ of Corti- is made up hair cells and is essential in the sensation of hearing
C. Incus- is one of the bones in the middle ear along with the malleus and Stapes
Ahmee Ashai was admiring his six pack abs and 24” penis in front of the mirror, when suddenly he was rudely interrupted by his ogre roommate’s loud lovemaking next door. His ogre roommate screamed in ecstasy as the ogre’s most inferior part of the outer ear was suckled viciously. What part of the ogre’s ear was suckled during the ogre’s incredibly loud lovemaking session?
A. Auricle B. Tragus C. Helix D. Lobule E. Tympanic Membrane
AA
ANSWER = D. Lobule
Lobule is the lowest part of the auricle in the outer ear. It is commonly pierced and suckled during the sex.
Auricle is the whole outer ear.
Helix is the upper part of the auricle.
Tragus is the little portion of skin that covers up the external auditory canal. It is located more medially in the auricle.
Tympanic membrane is at the end of the external auditory canal and would be located more medially and superior than the lobule.
Which of the following is a characteristic of Perilymph?
A. Fluid in the membraneous labyrinth.
B. Similar in composition to intracellular fluid
C. Similar in composition to extracellular fluid
D. Low sodium and high potassium concentrations.
E. Dog with Goggles
AA
ANSWER C. Similar in composition to extracellular fluid.
Perilymph resembles extracellular fluid and CSF in composition with high sodium and low potassium concentrations.
Answer choices A, B, and D are all characteristics of Endolymph.
Which of the following is a characteristic of kinocilium?
A. Tallest row of stereocilia.
B. If it bends away from the stereocilia hair bundle, it generates an inhibitory action potential.
C. If it bends toward the stereocilia hair bundle, it generates a stimulatory action potential.
D. Double-joined true cilium
E. Decrease in height in one particular direction on the stereocilia sensory hair bundle.
F. Dog with Goggles
AA
ANSWER B. If it bends away from the stereocilia hair bundle, it generates an inhibitory action potential.
Kinocilium is responsible for the polarity and generating membrane potential. When it bends away from the stereocilia hair bundle, it is inhibitory. When it bends toward the stereocilia hair bundle, it is stimulatory.
A. Smallest row of stereocilia is WRONG because it is located BEHIND the tallest row of stereocilia. It is the longest stereocilia.
D. Double-joined true cilium is WRONG because it is a single true cilium.
E. Decrease in height in one particular direction on the stereocilia sensory hair bundle is WRONG because it is an increase in height.
Octonia rests on the ___________ and is responsible for ________ of stereocilia in the _______. Octonia is made up of _______.
Octonia rests on the otolithic membrane and is responsible for deflection of stereocilia in the utricle and saccule. Octonia is made up of crystalline of calcium carbonate and protein named otoconia
Which of the following is False?
A) There is one row of inner hair cells in each semicircular canal
B) There are 3 rows of outer hair cells in each semicircular canal
C) Reissner’s membrane separates scala media from scala tympani
D) Striata vascular is responsible for the ionic composition of Endolymph
E) hair bundles on the hair cells are composed of actin
FA
C) Reissner’s membrane separates the Scala Media from Scala Vestibule. the Basilar membrane is what separates the Scala media and Scala Tympani
At which of the following layers most commonly dissociates during retinal detachment?
A) Retinal pigmental epithelium B) Layer of Rods and Cones C) Inner nuclear layer D) Outer plexiform layer E) Inner plexiform layer
FA
B) retinal detachment most commonly occurs when the layer of rods and cones dissociates from the retinal pigment layer.
