Histology of Epithelium Flashcards

(79 cards)

1
Q

EPITHELIUM

  • Covers ______ surfaces of the body like the skin
  • Lines ______ cavities and organs like the stomach
  • Forms _____ and glands like the mammary gland
  • Lines _____ like the sweat gland duct
A
  1. External
  2. Internal
  3. Organs
  4. Ducts
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2
Q

What features makes the inner ear epithelium
unique among epithelial surfaces?

A

It is the only epithelial surface with a vascular
supply; other epithelial surfaces are avascular

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3
Q

Can epithelium mitotic rate be high?

A

Yes, can have a high rate

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4
Q

What separates epithelium from underlying
tissue?

A

Basement membrane

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5
Q

Classify this type of epithelium

A

Simple squamous epithelium

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6
Q

Classify this type of epithelium:

A

Simple cuboidal epithelium

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7
Q

Classify this type of epithelium:

A

Simple Columnar epithelium

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8
Q

Classify this type of epithelium:

A

Pseudostratified epithelium

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9
Q

What type of stratified epithelium is shown?

A

Cuboidal

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10
Q

What type of stratified epithelium is shown?

A

Squamous

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11
Q

What type of stratified epithelium is shown?

A

Transitional

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12
Q

Epithelium composed of a single layer of thin flat cells is called?

A

Simple squamous epithelium

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13
Q

Epithelium composed of multiple layers of cells is called:

A

Stratified epithelium

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14
Q

A single cell layer of epithelium with nuclei at different heights on cross section is called?

A

Pseudostratified epithelium

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15
Q

A multilayered epithelium with large not flat cells on the surface is called:

A

Transitional epithelium

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16
Q

An epithelial cell which is as tall as it is wide is called?

A

Cuboidal epithelium

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17
Q

An epithelial cell which is taller than wide is
called:

A

Columnar epithelium

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18
Q

A multilayered epithelium with flat cells on the surface is called:

A

Stratified squamous epithelium

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19
Q

Name this type of epithelium:

A

Stratified squamous epithelium

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20
Q

Name this type of epithelium:

A

Simple cuboidal epithelium

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21
Q

Name this type of epithelium:

A

Columnar epithelium or simple columnar epithelium

(both are acceptable)

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22
Q

Name this type of epithelium:

A

Pseudostratified columnar epithelium (note the nuclei are at different heights)

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23
Q

Name this type of epithelium:

A

Transitional epithelium (note larger cells on top have more cytoplasm; the cells on top are not flat)

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24
Q

Name this type of single layer epithelium:

A

Simple squamous epithelium

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25
An epithelial malignant tumor is called:
Carcinoma
26
A “ precancer ” change in epithelium is called:
Dysplasia
27
In the bladder of a patient, the transitional epithelium was replaced by stratified squamous epithelium. This change is called:
Metaplasia
28
The base of epithelial lining attaches to the:
Basement membrane
29
The basement membrane portion immediately adjacent to the epithelium called:
Basal lamina
30
The type of epithelium lining the outer surface of the lungs is:
Simple squamous epithelium
31
The epithelium lining the outer surface of the lungs is called:
Mesothelium
32
A brush border in cuboidal epithelium refers to which cell structures
Microvilli
33
What is the role of microvilli structures?
To increase absorptive surface
34
Name two structures which may be seen on simple columnar epithelial surfaces
1. Microvilli 2. Cilia
35
Name two structures which may be seen on pseudostratified epithelial surfaces
Cilia and Stereocilia
36
Name these structures? What do they arise from?
1. Cilia 2. Basal Bodies
37
Non motile cilia are called:
Stereocilia
38
An example of where Stereocilia are located is:
* Inner ear hair cells * Vas deferens * Epididymis
39
What structures between epithelial cells do not allow movement of molecules between cells?
Zona occludens aka tight junctions
40
What structure creates adhesions between cells?
Zona adherens aka adhering junctions
41
What structure attaches epithelial cells to the basement membrane?
Hemidesmosomes
42
What structure allows movement of molecules between epithelial cells?
Gap junctions
43
What structure strongly attaches epithelial cell to epithelial cell?
Desmosomes
44
Mesothelial cells have active transport of gases and fluids.
FALSE (they allow passive transport)
45
Mesothelial cells reduce friction between surfaces. TRUE or False?
True
46
Mesothelioma is a malignant mesothelium proliferation. TRUE or FALSE
True
47
The difference between epidermis squamous epithelium and squamous mucosa is:
The superficial anucleate layer in the epidermis is absent in mucosa.
48
The pattern made by the superficial anucleate layer is often described as:
Basket weave pattern
49
Name these
NSSE Nonkeratinized stratified squamous epithelium (squamous mucosa)
50
Name these?
Pseudostratified epithelium
51
Name these?
Keratinized stratified squamous epithelium
52
Urothelium refers to what type of epithelium?
Transitional epithelium
53
What are the surface cells called in urothelium ?
Umbrella cells
54
Small bowel mucosa is what type of epithelium?
Simple columnar epithelium
55
What two cell types are present in small bowel mucosa?
Absorptive cells Goblet cells
56
Respiratory mucosa is what type of epithelium?
Pseudostratified epithelium
57
What two cell types are present in respiratory mucosa?
Ciliated cells Goblet cells
58
In this respiratory epithelium, name the two cell types.
* A: Ciliated Epithelial Cell * B: Goblet Cell
59
Name this epithelial type?
Simple columnar epithelium
60
Name this epithelium
Pseudostratified epithelium
61
Name the two types of glands
Exocrine and Endocrine
62
Which of the two is attached to the surface by ducts
Exocrine
63
Which type of gland has secretions that are expelled on a surface?
Exocrine
64
Which type of gland has secretions which enter the capillaries?
Endrocrine
65
Name the type of gland identified below in respiratory mucosa
Unicellular Exocrine gland
66
Name the type of gland identified below in colon mucosa
Simple Exocrine Gland
67
An exocrine gland with branching is classified as a:
Compound exocrine gland
68
What are the three types of compound exocrine glands:
1. Acinar glands 2. Tubular glands 3. Tubuloacinar glands
69
A gland composed of a duct with acini is classified as:
Compound acinar gland
70
A gland composed of duct with multiple tubules is classified as:
Compound tubular gland
71
A gland composed of a duct with multiple acini and tubules is classified as:
Compound tubuloacinar gland
72
Name the three types of secretions:
Merocrine Apocrine Holocrine
73
Exocystosis corresponds to what type of secretion?
Merocrine secretion
74
A decapitated cell fragment without cell death corresponds to what type of secretion?
Apocrine secretion
75
Secretions composed of dead cells corresponds to what type of secretion?
Holocrine
76
Endocrine glands can be classified by the number and grouping of cells. List the three types in the classification noted in the prior slide.
``` 1. Diffuse neuroendocrine system or individual scattered cells (both acceptable) 2. Endocrine tissues 3. Endocrine organs or major endocrine organs (both acceptable) ```
77
The lighter staining cells in this image correspond to endocrine cells in the stomach. These cells correspond to the:
Diffuse neuroendocrine system (DNES)
78
The pancreatic islet of Langerhans below corresponds to what type of endocrine gland?
Endocrine tissue
79
List major endocrine organs.
1. Pituitary gland 2. Adrenal glands 3. Thyroid gland 4. Parathyroid glands