Logo

Go on. Explore!

lvl 0 • 0 xp

lvl 1

HomeMarketDecksInterests
Hearing Science Test 3: Scala Media (cochlear duct)

Hearing Science Test 3: Scala Media (cochlear duct)

memorize.aimemorize.ai (lvl 286)
Star 0%
Star 0%
Star 0%
Star 0%
Star 0%
(0)
(0)
(0)
27 cards
()
Section 1

Preview this deck

95%

Front

1 / 27

Scala
Star 0%
Star 0%
Star 0%
Star 0%
Star 0%

0.0

0 reviews

5
0
4
0
3
0
2
0
1
0

Active users

0

All-time users

0

Favorites

0

Last updated

6 years ago

Date created

Mar 14, 2020

Cards (27)

Section 1

(27 cards)

95%

Front

_____ of afferent fibers are connected to the IHC's

Back

type 1 fibers

Front

large, myelinated fibers a. Make up 95% of the VIII nerve b. The majority innervate the IHCs

Back

tip-link structures

Front

small filaments that connect to other cilia and ion channels 1. Connect to mechanotransduction channels and open these channels when the cilia are deflected

Back

type 1 and type 2

Front

What are the 2 distinct fibers that VIIIth nerve consists of?

Back

tectorial membrane

Front

1. situated immediately above the organ of Corti and covers its entire length a) The stereocilia tips of the outer hair cells are firmly imbedded in the underside of the tectorial membrane c) Attached to the spiral limbus on one side and is thought to be attached to supporting cells on the other

Back

reticular lamina

Front

1. forms the ceiling of the sensory and supporting cells of the organ of Corti 2. Separates the endolymph from the internal structures of the organ of Corti 3. Formed by the phalanges of the Deiters' and inner phalangeal cells, as well as by the inner and outer pillar cells, along with the top margin of the sensory cells

Back

inner hair cells (IHC's)

Front

i. Single row on BM (about 3500 cells) ii. Ovoid or flask-shaped iii. Have more mitochondria than the OHCs iv. The stereocilia (on top of cuticular plate): 1. Arranged in 3 rows 2. Are a U-shape pattern on top of the hair cell 3. Are not embedded in the tectorial membrane

Back

efferent innervation

Front

________ of the OHCs is inhibitory, reducing the afferent output caused by hair cell stimulation

Back

deiter's cells, inner and outer pillar cells

Front

What are the supporting cells of the scala media?

Back

organ corti

Front

lies on top of the basilar membrane (Runs the length of the cochlear duct and consists of supporting structures, sensory cells and nerve fibers) THES ENSORY ORGAN FOR HEARING

Back

cross-links

Front

fibers that connect cilia together so they move as a unit; in stereocilia

Back

tectorial membrane, reticular lamina, hair cells

Front

What are the parts of the scala media?

Back

cochlear duct

Front

the scala media is also called the ______

Back

5%

Front

_____ of the afferent fibers are connected to the OHC's

Back

scala media

Front

Houses the sensory organ for hearing: the Organ of Corti.

Back

one to many innervation

Front

i. Each OHC shares its innervation with 10 other OHCs (all being innervated by the same eighth nerve fiber)

Back

inner and outer pillar cells

Front

form the tunnel of Corti and contribute to the reticular lamina i. Located between the IHCs and OHCs 1. Help maintain a strong structural attachment between the reticular lamina and the BM

Back

type 2 fibers

Front

small, both myelinated and unmyelinated fibers a. Innervate the OHCs (unmyelinated)

Back

cell body, stalk, and phalangeal process

Front

What are the 3 main parts of the deiter's cells?

Back

sterocilla

Front

attached underneath the tectorial membrane; there are 3 rows on each cells; for a W-shape on each OHC - have poors that open upon excitation and allow K+ ions inti the cell contains cross-links and top-link structures

Back

kinocilium

Front

a type of seteocilla; the tallest of the stereocilia for each hair cell

Back

contractile proteins

Front

1. Allows for expansion and contraction of the hair cells 2. have both a motor and sensory response to stimulation

Back

deiter's cells

Front

supports the hair cells; phalanges help form the reticular lamina

Back

many-to-one innervation

Front

i. Each IHC is connected to as many as 10 eighth nerve fibers

Back

outer hair cells (OHC's)

Front

3-5 rows on BM Cylinder-shaes; contains ccontractile proteins

Back

inner hair cells (IHC's), outer hair cells (OHC's), stereocilla hair cells

Front

What are the 3 main hair cells of the scala media?

Back

base; apex

Front

The relative mass and dimensions of the tectorial membrane increase from _____ to ____

Back