MSK: Gross Anatomy Exam 1 > Histology: Epithelium > Flashcards

Histology: Epithelium Flashcards

(59 cards)

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1
Q

What are the 6 basic characteristics of epithelial tissue?

A

Cellularity

Polarity

Attachement

Avascular

Innervation

Regeneration

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2
Q

Epithelial Polarity:

What is the basal domain?

A

Rests on the basal lamina, anchors cell to underlying connective tissue

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3
Q

Epithelial Polarity:

What is the apical domain?

A

Directed toward the exterior

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4
Q

Epithelial Polarity:

What is the Lateral domain?

A

Communicates with adjacent cells

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5
Q

What are the (4) types of apical specializations?

A
  1. Cilia
  2. Flagella
  3. Microvili
  4. Stereocilia
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6
Q

What are microvili?

A

-Correlate to absorptive capacity

-Actin based

-Can be up to 100k on single cell

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7
Q

What are stereocilia/stereovilli?

A
  • Unusually long and immotile
  • Actin core
  • ONLY IN: epididymis and sensory cells of inner ear
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8
Q

What are cilia?

Describe the 3 subcategories

A
  • Microtubule based
    1. Motile: wave-like fashion, remove debris
    2. Primary: immotile, chemosensors, osmosensors, mechanosensors
    3. Nodal: embryonic
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9
Q

What are flagella?

A
  • Motile cilia
  • Provides forward movement for sperm cell
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10
Q

Intercellular Junctions:

What are occluding junctions?

A
  • Impermeable
  • Near most apical surface
  • More junctions=lower permeability

*OCCLUDINS, CLAUDINS

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11
Q

Intercellular Junctions:

What are anchoring junctions?

A

2 types:

  1. Zonula Adherens: interacts w/ actin
  2. Maculae Adherens: (Desmosomes) interacts with intermediate filaments
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12
Q

Intercellular Junctions:

What are gap junctions?

A
  • Communication
  • *connexin aggregates
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13
Q

Intercellular Junctions:

What are focal adhesions?

A

Anchor actin filaments to basement membrane

*use INTEGRINS

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14
Q

Intercellular Junctions:

What are hemidesmosomes?

A

-Anchor intermediate filaments to basement membrane

*use INTEGRINS

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15
Q

Multiple layers in epithelia is named?

A

Stratified

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16
Q

Single layer of epithelium named?

A

Simple epithelium

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17
Q

Epithelium classified by shapes:

What are the classifications (3)?

A
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18
Q

Table of classificaiton of epithelia:

A
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19
Q

Identify this:

A

Simple Squamous Epithelium

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20
Q

Where are simple squamous cells found?

A

Lining of blood and lymphatic vesseles

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21
Q

What is the function of simple squamous cells?

A

Exchange, barrier and lubrication

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22
Q

What is this?

A

Simple squamous epithelium

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23
Q

Simple squamous:

Where found in endothelium?

A

lining of serous membranes

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24
Q

Simple squamous:

Where found in mesothelium?

Study These Flashcards
A

Lining alveoli in lungs

Loop of henle in kidney

25
What are these?
Simple cuboidal cells
26
Function of **simple cuboidal?**
Absorption, barrier, secretion
27
Location of **simple cuboidal?**
Kidney tubules Glands Ducts Terminal bronchioles Ovary
28
Where are **simple columnar** cells found?
Auditory tubes Uterus Oviducts Stomach SI/LI Gallbladder
29
What is the function of **simple columnar?**
Absorption Secretion
30
What is this?
Simple columnar cells
31
Where are **pseudostratified columnar ciliated** cells located?
Lining of nasal cavity, pharynx, trachea, bronchi
32
What is the function of **pseudostratified columnar ciliated**?
**Absorption** and **secretion** of debris and particulate movement
33
What layer has **goblet cells** associated with it?
Pseudostratified Columnar Ciliated
34
Where is **urothelium** found?
Bladder Ureters Urethra
35
What is the function of **urothelium?**
Barrier Distensible property
36
What is this?
Urothelium
37
Where are **nonkeratinized stratified squamous** epithelium?
Oral cavity Portions of pharynx Esophagus Anus Vagina Urethra Cornea
38
What is the function of **nonkeratinized stratified squamous** cells?
Barrier and protection
39
What is this?
Nonkeratinized Stratified Squamous
40
Where are **keratinized stratified squamous** cells?
Epidermis of the skin
41
What is the function of **keratinized stratified squamous** epithelium?
Barrier and protection
42
What is this?
Keratinized Stratified squamous
43
What is a distinguishing identifier for **keratinized stratified squamous?**
Apical layer of cells do NOT HAVE NUCLEI
44
Where are **stratified cuboidal cells?**
Sweat glands Ducts Ovarian follicles Salivary gland ducts
45
What is the function of **stratified cuboidal epithelium?**
Barrier and passageway
46
What is this?
Stratified cuboidal
47
What is the basement membrane?
Specialized sheet of extracellular material Selective barrier b/w tissues permits diffusion of nutrients
48
What are **mucous membranes?**
Epithelial tissue tha **secretes mucus** \*lines body cavities and tubular organs GUT and RESPIRATORY passages
49
What are **serous membranes?**
Epithelial tissue that lines specific internal cavities of the body Mesothelium: simple squamous epithelium that comprise part of a serous membrane
50
What do **glands** do?
Secrete mucus, hormones, enzymes and wastes
51
What are the three types of glands we are focusing on?
- Merocrine gland - Holocrine gland - Apocrine gland
52
Describe the actions of the following glands:
53
What is an example of a **unicellular gland?**
Goblet cell: Mucus secreting cell found lining the intestines and respiratory tract
54
Multicellular Glands: Secretory cells are either ______ or \_\_\_\_\_\_\_
Mucus; Serous cells
55
Serous acini stain...
DARK because it's water based
56
Mucous acini stain...
LIGHT!!!
57
Descibe the two aspects of a multicellular gland:
58
Be aware of these
59
Be aware of this
MSK: Gross Anatomy Exam 1
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