Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Histology NEU 205 > Ear > Flashcards

Ear Flashcards

1
Q

External Ear consists of

A
  • Auricle
  • External Auditory meatus
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Gland Unique to External Auditory meatus

A

Ceruminous Gland

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

function of cerumen

A

Protective function, antimicrobial Effect

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

Layers of Ear drum

A
  • Outer layer: Keratinized stratified squamous epithelium
  • Inner layer: Simple cuboidal Epithelium
  • Middle layer: Dense CT, with outer radial collagen fibers, inner Circular collagen fibers
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Name of part of tympanic membrane which is flacid, and its location

A

Shrapnel’s membrane (pars flaccida), located at Antero-superior quadrant

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

Function of External Ear

A

collection of sound waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Lining of tympanic cavity (middle ear)

A

Simple cuboidal Epithelium resting on lamina propria adherent to periosteum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

Enumerate Contents of middle ear

A

3 Bones:
* Malleus
* Incus
* Stapes

2 Muscles:
* Tensor tympani
* Stapedius

1 Nerve: Chorda tympani

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

footplate of stapes fits into

A

Oval window of inner ear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

Function of Middle ear

A

Amplification of mechanical Vibrations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Importances of muscles of middle ear

A
  • Regulation of sound conduction
  • Reflex contration during loud sounds to prevent damage if receptors
How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Auditory tube connects

A

Middle ear with Nasopharynx

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Function of auditory tube

A

Equalize pressure on both sides of the drum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Auditory tube is lined with

A

Pseduostratified columnar ciliated epithelium

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Infection spreading from Nasopharyx to Middle ear through auditory tube may cause

A

Otitis Media

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

Cochlea spirals ….. turns around Modiolus

A

2 1/2

17
Q

Modiolus contains

A
  • Blood vessels
  • Nerve fibers
  • Cell bodies of neurons of Spiral Ganglia
18
Q

Extension of Modiolus into lumen of cochlear tube is called

A

Spiral Lamina

19
Q

thickening on outer bony wall of cochlear tube is called

A

Spiral Ligament

20
Q

membrane stretching between Spiral Lamina & spiral Ligament is called

A

Basilar membrane

21
Q

Organ of corti Lies on

A

Basilar membrane

22
Q

Vestibular Membrane forms

A

roof of cochlear duct

23
Q

Basilar and vestibular membranes divide cochlear tube into

A

3 parts:
* Scala vestibuli: above vestibular membrane, containing perilymph
* Cochlear duct: has Vestibular membrane as roof & Basilar membrane as floor, it contains Endolymph
* Scala Tympani: Below Basilar membrane, contains **Perilymph **

24
Q

Both scala vestibuli & scala tympani are lined with

A

simple Squamous epithelium

25
Q

Difference between Vestibular Membrane & basilar Membrane

A
  • vestibular membrane is lined with simple sqamous mesothelium on both sides
  • Basilar membrane is lined with simple squamous mesothelium on 1 side
26
Q

outer wall of cochlear duct is made up of

A

Stria vascularis: modified epithelium responsible for formation of endolymph, it consists of Capillaries and cells with basal infoldings

27
Q

Cells that form boundaries of tunnel of corti

A

Inner & outer pillar cells

28
Q

cells that form direct support with hair cells of organ of corti

A

Inner & outer phalangeal cells

29
Q

difference between inner & outer phalangeal cells

A
  • Inner phalangeal cell forms 1 row of cells only, and completely surrounds the hair cell
  • Outer phalangeal cells form 3-4 rows of cells, they form Cup shape to give out phalanx to support the hair cell (basal 1/3)
30
Q

tip of stereocilia of hair cells is embedded in

A

tectorial Membrane

31
Q

Bases of hair cells contain

A

Bipolar nerve cells and their dendrites

32
Q

otolithic membrane of vestibule contains

A

CaCO3

33
Q

Hair cells of macula of Vestibule are …….. mechanoreceptor hair cells

A

Type 1 & 2

34
Q

Hair cells of vestibule have

A

Many sterocilia and one true cilium (kinocilium)

Histology NEU 205 (6 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions