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All main topics / Medicine / Microanatomy

Microanatomy: Epithelium (42 Cards)

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What is the basal lamina produced by?
epithelial cells
2
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From what 3 embryonic layers does epithelium originate?
Endoderm
Mesoderm
Ectoderm
3
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What part of the epithelium comes from the ectoderm?
External Surface
Ependymal cells lining neural canal
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The mesoderm gives rise to what in the epithelium?
Epithelia
Mesothelia
Endothelium
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The endoderm gives rise to what type of epithelia?
Internal surface epithelia
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What type of epithelial cell is narrow around the edges and might bulge slightly?
Squamous
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What is the major difference between pseudostratified and startified epithelium?
In pseudo, all cells touch the basal membrane
8
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What is the major cytoskeletal component of stereocilia?
Actin
9
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What is longer, microvilli or stereocilia?
Stereocilia
10
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Where is simple squamous epithelium located?
Blood vessels
Lung
Kidney
Coelom
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What are the functions of simple squamous epithelium?
Transport of materials
Lubrication
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What is the function of simple squamous epithelium?
Secretion
Absorption
13
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Where is simple cuboidal epithelium found?
Secretory and ductal portions of many glands
Surface of lens and ovary
Kidney tubules
Respiratory tract
14
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What does simple columnar epithelium do?
Secrete
Absorb
15
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Where is simple columnar epithelium located?
Lining of stomach
Lining of Small Intestine
Lining or Large Intestine
Lining of uterus and uterine tubes
Lining of some glands
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What are the functions of pseudostratified columnar epithelium?
Secretion
Abosorption
Lubrication
Protection
Transportation
17
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Where is pseudostratified columnar epithelium found?
lining of upper respiratory tract
lining of parts of urogenital system
Transition in ducts and some glands
18
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What are the two categories of stratified squamous epithelium?
Cornified
Non-cornified
19
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Where is cornified stratified squamous epithelium located?
General body surface
buccal cavity
anal region
ruminant forestomach
20
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From apical to basal, name the layers of the epidermis
Stratum corneum
Stratum granulosum
Stratum spinosum
Stratum basal
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What is the most basal layer of the epidermis called and what do these cells act as?
Stratum basale
Act as stem cell population
22
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Why are there spaces in the stratum spinosum?
Because processing causes shrinkage of cells
23
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What is keratohyalin and in what layer of the epidermis is it located?
Keratohyalin is a precursor to keratin and it is located in the stratum granulosum
24
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Where are stratified cuboidal cells located?
Specific portions of urogenital system
Ducts of various glands
Transitional areas
25
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Where is stratified columnar epithelium found?
Portions of upper respiratory tract
Ducts of some glands
26
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What is the most basal layer of the epidermis called and what do these cells act as?
Stratum basale
Act as stem cell population
27
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What do the transitional epithelium look like when relaxed?
Pillows
28
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What are the three release mechanisms for exocrine glands?
Holocrine
Merocrine
Aporine
29
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What type of gland still has a connection to the surface?
Exocrine
30
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What do mucous glands look like when stained with H&E?
The mucinogen doesn't take up H&E very well and the nuclei are flattened and pushed basally.
31
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How do serous glands look when stained with H&E?
They stain pink because of all of the eosinophillic enzymes.  The nuclei are round and basal.
32
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What is the only unicellular gland and in what type of tissue is it found?
The goblet cell
Psuedostratified columnar epithelium
33
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What is another name for clusters of secretory units?
Adenomeres
34
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What is the difference between simple and compound glands?
Compound glands have branched ducts and simple glands do not
35
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What are the three different morphologies of exocrine glands?
Tubular
Acinar (Alveolar)
Tubuloalveolar
36
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Where do exocrine glands excrete their product?
The blood
37
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What are the two types of endocrine glands?
Cords
Follicular
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What is a follicular gland?
An endocrine gland that stores hormone or pre-hormone in a lumen
39
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What is the glycocalyx?
Glycoproteins that extend from the PM and prevent non-dissolved substances from entering the cell.
40
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What are cilia made up of?
microtubules
41
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Name the lateral surface modifications
Zonulae occludentes (tight junctions)
Zonulae adherens (intermediate junctions)
Desmosomes (macule adherens)
Gap junctions
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What structures anchor basal cell membrane to basal lamina?
Hemidesmosomes
Flashcard set info:
Author: toncrayb
Main topic: Medicine
Topic: Microanatomy
Published: 17.10.2009
Tags: veterinary, medicine, oregon, Epithelium
 
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