Histology: Epithelia and Glands Pt. 2

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What are the 2 types of stratified columnar epithelium?

Keratinized and Nonkeratinized

What is the appearance of stratified squamous epithelial cells?

Squamous cells apically, but basal layers vary from cuboidal to columnar

Nuclei of stratified squamous epithelia are ____ located.

Centrally

Keratinized epithelium contains a _____.

Dead superficial cell layer Signup and view all the answers

Nonkeratinized epithelium contains a ______.

Live superficial cell layer Signup and view all the answers

What is the skin an example of?

Keratinized stratified squamous epithelium Signup and view all the answers

What is the function of the skin?

Protection against abrasion, irradiation and bacterial invasion Signup and view all the answers

What are the 2 examples of Nonkeratinized stratified squamous epithelium?

Oesophagus and vagina Signup and view all the answers

What is the function of Nonkeratinized epithelium?

Moist and protective layer Signup and view all the answers

In stratified cuboidal epithelium, there are of cells, and nuclei are _.

2 layers, centrally located and spherical Signup and view all the answers

What are the functions of stratified cuboidal epithelia?

Protection of ducts, and secretion Signup and view all the answers

Examples of stratified cuboidal epithelium.

Dicts of the sweat glands and salivary glands Signup and view all the answers

How are the cells of stratified columnar epithelium arranged?

Single layer of columnar cells on one or several layers of cuboidal cells Signup and view all the answers

The nuclei of stratified columnar epithelium are _____?

Basal and oval Signup and view all the answers

What are examples of stratified columnar epithelium?

Ducts of the mammary gland and large salivary glands Signup and view all the answers

What is another name for "transitional epithelium"?

Urothelium Signup and view all the answers

Cells of transitional epithelium are _____.

Apical cells often large, round and bi-nucleated Signup and view all the answers

Where are nuclei of transitional epithelia located?

Centrally Signup and view all the answers

What are the functions of transitional epithelium?

Distentiin, protective barrier between urine and underlying tissue, changes shape in response to stretching Signup and view all the answers

Examples of transitional epithelium.

All of the above Signup and view all the answers

Cells of pseudostratified columnar epithelium differ in _, not all cells reach .

Height, apical surface Signup and view all the answers

The nuclei present in pseudostratified columnar epithelia are at various positions in cells.

True Signup and view all the answers

Which is NOT a function of pseudostratified columnar epithelium?

Protection Signup and view all the answers

Examples of pseudostratified columnar epithelium are: , (canals) of many glands and organs (, _).

Trachea, excretory ducts, testes, female reproductive tract Signup and view all the answers

What are the 3 special features of epithelia?

Basement membrane, microvilli and cilia, cell junctions Signup and view all the answers

What does the basement membrane separate?

Epithelia from underlying connective tissue Signup and view all the answers

The BM acts as a scaffolding on which can and after injury.

Epithelium, grow, regenerate Signup and view all the answers

How many layers does the basement membrane contain?

2 Signup and view all the answers

What are the layers of the BM?

Basal lamina and reticular lamina Signup and view all the answers

The Basal lamina

Thickness = 80nm Glycoproteins of the basal lamina = Laminin and collagen type 4 Where protein filaments are embedded in = Amorphous matrix Selectively permeable between 2 things = Epithelium and connective tissue Signup and view all the answers

The reticular lamina consists of _ embedded in __.

Reticular fibres, ground substance Signup and view all the answers

What do the fibres of reticular lamina connect?

Basal lamina with underlying connective tissue Signup and view all the answers

Reticular lamina contains fibronectin.

True Signup and view all the answers

What 2 finger-like projections are extensions of epithelial cells?

Microvilli and stereocilia Signup and view all the answers

Microvilli contain ____.

Actin filaments Signup and view all the answers

What is the function of the apical surface microvilli and stereociliae?

To increase surface area of epithelial cells Signup and view all the answers

Mircovilli and stereociliae are found in epithelia active in ____.

Absorption Signup and view all the answers

Microvilli are much shorter than stereocilia.

True Signup and view all the answers

Stereocilia are moving structures (motile).

False Signup and view all the answers

Where are goblet cells and ciliae found?

In pseudostratified and columnar epithelia Signup and view all the answers

Ciliae can help move molecules within the _____.

Lumen Signup and view all the answers

Goblet cells and ciliae are found where?

GI tract and trachea Signup and view all the answers

What are the 3 major types of cell junctions?

Communicating, anchoring and occluding Signup and view all the answers

Which of the following is considered a communicating junction?

Gap junctions Signup and view all the answers

Which of the following are anchoring junctions?

All of the above Signup and view all the answers

Which of the following are occluding junctions?

Tight junctions Signup and view all the answers

What is meant by the term 'occluding'?

Obstructing or closing up Signup and view all the answers

Gap junctions connect cytoplasm of 2 cells and are made up of proteins called _____.

Connexins Signup and view all the answers

Desmosomes are a group of ____ inserted into the opposing plasma membrane.

Glycoproteins Signup and view all the answers

What are the group of glycoproteins that make up a desmosome called?

Cadherins Signup and view all the answers

What are desmosomes likened/compared to?

A zipper linking both cells Signup and view all the answers

What do desmosomes mediate?

Cell to cell adhesion Signup and view all the answers

Histology: Epithelia and Glands Pt. 2

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Questions and Answers

What are the 2 types of stratified columnar epithelium?

What is the appearance of stratified squamous epithelial cells?

Nuclei of stratified squamous epithelia are ____ located.

Keratinized epithelium contains a _____.

Nonkeratinized epithelium contains a ______.

What is the skin an example of?

What is the function of the skin?

What are the 2 examples of Nonkeratinized stratified squamous epithelium?

What is the function of Nonkeratinized epithelium?

In stratified cuboidal epithelium, there are ____ of cells, and nuclei are _____.

What are the functions of stratified cuboidal epithelia?

Examples of stratified cuboidal epithelium.

How are the cells of stratified columnar epithelium arranged?

The nuclei of stratified columnar epithelium are _____?

What are examples of stratified columnar epithelium?

What is another name for "transitional epithelium"?

Cells of transitional epithelium are _____.

Where are nuclei of transitional epithelia located?

What are the functions of transitional epithelium?

Examples of transitional epithelium.

Cells of pseudostratified columnar epithelium differ in _____, not all cells reach ____.

The nuclei present in pseudostratified columnar epithelia are at various positions in cells.

Which is NOT a function of pseudostratified columnar epithelium?

Examples of pseudostratified columnar epithelium are: , ______ (canals) of many glands and organs (, _______).

What are the 3 special features of epithelia?

What does the basement membrane separate?

The BM acts as a scaffolding on which ____ can ____ and ____ after injury.

How many layers does the basement membrane contain?

What are the layers of the BM?

The Basal lamina

The reticular lamina consists of _____ embedded in ______.

What do the fibres of reticular lamina connect?

Reticular lamina contains fibronectin.

What 2 finger-like projections are extensions of epithelial cells?

Microvilli contain ____.

What is the function of the apical surface microvilli and stereociliae?

Mircovilli and stereociliae are found in epithelia active in ____.

Microvilli are much shorter than stereocilia.

Stereocilia are moving structures (motile).

Where are goblet cells and ciliae found?

Ciliae can help move molecules within the _____.

Goblet cells and ciliae are found where?

What are the 3 major types of cell junctions?

Which of the following is considered a communicating junction?

Which of the following are anchoring junctions?

Which of the following are occluding junctions?

What is meant by the term 'occluding'?

Gap junctions connect cytoplasm of 2 cells and are made up of proteins called _____.

Desmosomes are a group of ____ inserted into the opposing plasma membrane.

What are the group of glycoproteins that make up a desmosome called?

What are desmosomes likened/compared to?

What do desmosomes mediate?

Hemidesmosomes resemble desmosomes but are made up of INTEGRINS instead of CADHERINS.

For zonula ahderens junctions, the cytoplasmic face is linked to the _____.

Tight junctions isolate the ___ of the body from the ____.

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In stratified cuboidal epithelium, there are of cells, and nuclei are _.

Cells of pseudostratified columnar epithelium differ in _, not all cells reach .

Examples of pseudostratified columnar epithelium are: , (canals) of many glands and organs (, _).

The BM acts as a scaffolding on which can and after injury.

The reticular lamina consists of _ embedded in __.

Tight junctions isolate the _ of the body from the __.