Comd 3400 Exam 3 - Cm 14

Front 1

Where does the endolymphatic sac reside?

Back 1

in the dura lining of the brain

Front 2

The perilymph goes through the ________ _________ and moves up into where the _________ _______ ______ is lining the neural system.

Back 2

cochlear aquaduct
cerebral spinal fluid

Front 3

What does the endolymphatic duct connect to?

Back 3

endolymphatic sac

Front 4

Remember that most of the inner ear is made of a ___________ duct that is floating around inside an __________ duct.

Back 4

membranous
osseous

Front 5

What supports the membranous duct and keeps it away from the bony walls of the osseous canal?

Back 5

bundles of connective tissue

Front 6

As you move toward the vestibule, there are ______ bundles of connective tissue and there are _____ in the cochlea.

Back 6

less
none

Front 7

What is the little tube that runs down from the saccule to the cochlea?

Back 7

canal reuniens

Front 8

How does endolymph get from the saccule into the cochlea?

Back 8

canal reuniens

Front 9

What is the large nerve coming off the back of the cochlea?

Back 9

cochlear nerve

Front 10

What is the nerve that comes off the semicircular canals and the back of the utricle and saccule?

Back 10

vestibular nerve

Front 11

What two nerves combine to make the cranial nerve, the acoustic nerve?

Back 11

vestibular and cochlear

Front 12

The membranous vestibule is a _______ system.

Back 12

static

Front 13

The sense organs in the vestibule give us ___________ of our _________ in space on a _________ plane while we are ____ ___________.

Back 13

perception
position
vertical
not moving

Front 14

What are the two sacs in the osseous vestibule?

Back 14

utricle
saccule

Front 15

Which vestibular sac fits into the elliptical recess?

Back 15

utricle

Front 16

Which vestibular sac fits into the spherical recess?

Back 16

saccule

Front 17

The spherical recess of the osseous vestibule is near the ___________ of the _______ ______________ of the __________.

Back 17

opening
scala vestibuli
cochlea

Front 18

In real life, which is larger: the utricle or saccule?

Back 18

utricle

Front 19

What is saccule Latin for?

Back 19

sac

Front 20

What is utricle Latin for?

Back 20

bag

Front 21

The utricle duct and the saccule duct ________ as they rise towards the top, ___________ to form the _____________ ________, which turns into the ______________ _____.

Back 21

combine
joining
endolymphatic duct
endolymphatic sac

Front 22

Where does the endolymphatic sac sit?

Back 22

dura lining of the brain

Front 23

What runs on either side of the endolymphatic duct through the osseous temporal bone?

Back 23

vestibular aquaduct

Front 24

What joins the saccule and the cochlea allowing endolymph to move through to the cochlea?

Back 24

canal reuniens

Front 25

The ampulla of the SCCs have ______ _______ coming out of them. There are _________ _________ in each of those ampulla which will send info off to the ________.

Back 25

nerve tufts
sensory organs
brain

Front 26

In addition to the ampulla, nerve tufts also come off of where?

Back 26

utricle and saccule

Front 27

All nerve tufts are part of the __________ nerve which is going to send _________/________ info to the brain.

Back 27

vestibular
balance/neural

Front 28

__________ are small areas/_______ organs within the wall of the utricle and the saccule.

Back 28

macula
sense

Front 29

At the base of the macula is a bed of __________ ________.

Back 29

epithelial cells

Front 30

______________ hair cells are _____________ in that epithelial base, and when they are stimulated, __________ ___________ is initiated and sent to the brain.

Back 30

Sensory
embedded
neural activity

Front 31

The macculae respond to what?

Back 31

linear forward and sideways movements of the head

Front 32

On top of the hair cells is a ___________ ________ that has a ____________ just slightly greater than the ______________ it's floating in. (If it were heavier, it would crush the hair cells).

Back 32

gelatinous mass
density
endolymph

Front 33

What does the gelatinous covering of the hair cells do?

Back 33

stimulates the hair cells

Front 34

Beneath the epithelial hair cells of the macula, a single _________ cell is represented. At the tip of the sensory cell is a row of ______________ hairs and also a large _______ hair on the side called ___________.

Back 34

sensory
sterocilia
coarse
kenocilium

Front 35

The sterocilia hairs and the kenocilium hair touch the bottom of the _____________ ______. Each hair cell has a __________ _______ coming off the bottom and they combine into a ________ __ _______ which become a branch of the ____________ _______ which carries info to the brain about our ___________.

Back 35

gelatinous mass
nerve fiber
cable of fibers
vestibular nerve
position

Front 36

If you were to tilt the macula area to the right, the ___________ ______ would slide and the hair cells would _______, which sends a signal off to the _______.

Back 36

gelatinous mass
bend
CNS

Front 37

What are the calcium carbonate crystals which assist the movement of the gelatinous mass?

Back 37

otholiths (ear rocks)

Front 38

What pulls otolith to one side or the other as the head is tilted?

Back 38

gravitational mass

Front 39

What are highly developed ciliated sensory cells in the membranous semicircular canal?

Back 39

crista ampullaris (sense organ in the ampulla)

Front 40

On top of the hair cells in the membranous semicircular canal is a gelatinous mass called what?

Back 40

gelatinous cupola

Front 41

The membranous semicircular canal system is _________.

Back 41

dynamic

Front 42

The membranous semicircular canal system operates under conditions of ____________ and _____________, when you are moving your head.

Back 42

acceleration
deceleration

Front 43

When you move your head, the ___________ has a tendency to move in the _________ direction than the __________ ____________ because of _________.

Back 43

endolymph
opposite
crista ampularis
inertia

Front 44

The endolymph __________ the hair cells which send a _________ response to the ___________ nerve branch, similar to the vestibular system's process.

Back 44

disturbs
neural
vestibular

Front 45

Since we have 3 semicircular canals, each at a different ________, each one is ___________ depending on how we ________ our head.

Back 45

angles
stimulated
move

Front 46

Which SCC is stimulated when we shake our heads "no" in a horizontal plane?

Back 46

lateral

Front 47

Which SCC is stimulated when we move our heads up and down vertically from ceiling to floor.

Back 47

posterior

Front 48

Which SCC is stimulated when we move our heads from ear to ear or side to side.

Back 48

superior

Front 49

Since we _______ move our bodies in an _______ plane, there is a __________ process involved to give the brain correct _________ info.

Back 49

hardly
exact
complicated
balance

Front 50

You have more potassium or Sodium in the endolymph?

Back 50

potassium

Front 51

Perilymph is higher in ___________ than __________.

Back 51

sodium
potassium

Front 52

What lets perilymph flow up to the cerebral spinal fluids?

Back 52

cochlear aquaduct

Front 53

Perilymph communicates with the ___________ ________ of the CNS.

Back 53

arachnoid space