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IMMS phase 1 > Histology epithelium > Flashcards

Histology epithelium Flashcards

1
Q

Describe epithelia…

A

A cohesive sheet of cells resting on a basement membrane.

They form barriers for:
protection, absorption and secretion.

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2
Q

What are the two types of epithelia?

A

Simple epithelia - single layer of cells on a basement membrane.

Stratified (compound) epithelia - Two or more layers of cells on a basement membrane.

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3
Q

What is this type of epithelia?

A

Simple epithelia

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4
Q

What is this type of epithelia?

A

Stratified (compound) epithelia

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5
Q

Describe simple squamous epithelia…

A

Function: Allows materials to pass through by diffusion and filtration. Secretes lubricating substances

Location: Alveoli in lungs. Lining of the heart, blood vessels and lymphatic vessels.

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6
Q

Describe simple cuboidal epithelia…

A

Function: Secretion and absorption.

Location: Ducts and secretory portions of small glands. Kidney tubules.

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7
Q

Describe simple columnar epithelia…

A

Function: absorption and secretes mucous and enzymes.

Location: ciliated tissues (bronchi, uterus, uterine tubes)
non-ciliated tissues (digestive tract and bladder)

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8
Q

Describe pseudo-stratified columnar epithelia…

A

Function: Secretes mucous
Location: ciliated (respiratory epithelia)

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9
Q

Describe stratified squamous epithelia…

A

Function: Protects against abrasion.

Location: Oesophagus, mouth, vagina

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10
Q

Describe stratified cuboidal epithelia…

A

Function: Protective tissue

Location: Sweat glands, salivary glands, mammary glands.

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11
Q

Describe stratified columnar epithelia…

A

Function: Secretion and protection

Location: male urethra and some glands.

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12
Q

Describe transitional (urothelium) epithelia…

A

Function: Allows urinary organs to expand and stretch

Location: Bladder, urethra, ureters.

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13
Q

What type of epithelia is this:

A

Simple squamous

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14
Q

What type of epithelia is this:

A

Simple cuboidal

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15
Q

What type of epithelia is this:

A

Simple coloumnar

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16
Q

What type of epithelia is this:

A

Pseudo-stratified columnar

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17
Q

What type of epithelia is this:

A

Stratified squamous

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18
Q

What type of epithelia is this:

A

Stratified cuboidal

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19
Q

What type of epithelia is this:

A

Stratified columnar

20
Q

What type of epithelia is this:

A

Transitional (urothelium)

21
Q

What is this image showing and what type of epithelium is this?

A

Peritoneum

Simple squamous

22
Q

What is this image showing and what type of epithelium is this?

A

Lung alveoli

Simple squamous

23
Q

What is this image showing and what type of epithelium is this?

A

Kidney

Simple cuboidal

24
Q

What is this image showing and what type of epithelium is this?

A

Salivary gland

simple cuboidal

25
Q

What is this image showing and what type of epithelium is this?

A

Stomach

Simple columnar

26
Q

What is this image showing and what type of epithelium is this?

A

Small Intestine

Simple columnar

27
Q

What structure is this image showing and where is it located?

A

Microvilli within the small intestine

28
Q

Describe microvilli…

A

Microscopic projections on luminal surface of absorptive cells.

29
Q

What structure is this image showing and where is it located?

A

Cilia on the Fallopian tubes

30
Q

What structure is this image showing and where is it located?

A

Cilia on trachea

31
Q

Describe cilia…

A

Microscopic projections on luminal surface of cells. Found in the respiratory tract and the reproductive tract.

32
Q

What is this image showing and what type of epithelium is this?

A

Pigmented skin

Stratified epithelia

33
Q

What is this image showing and what type of epithelium is this?

A

Oesophagus

Stratified squamous non-keratinising epithelium

34
Q

What is this image showing and what type of epithelium is this?

A

Vagina

Stratified squamous non-keratinising epithelium

35
Q

What is this image showing and what type of epithelium is this?

A

Thin skin

Stratified squamous keratinising epithelium

36
Q

What is this image showing and what type of epithelium is this?

A

Thick skin

Stratified squamous keratinising epithelium

37
Q

What is the difference between keratinising and non-keratinising stratified squamous epithelium?

A

Non-keratinising epithelium lacks protein such as keratin in the cells.

38
Q

What is this image showing and what type of epithelium is this?

A

Trachea

Pseudo-stratified epithelium

39
Q

What is this image showing and what type of epithelium is this?

A

Badder

Urothelium

40
Q

What is this image highlighting?

A

Basement membrane in vagina

41
Q

What is this image highlighting?

A

Basement membrane in the kidneys.

42
Q

Describe the basement membrane…

A

Composed of several extra-cellular proteins (collagen IV, fibronectin).

Can be seen when stained with PAS.

43
Q

Describe this epithelial junction…

A

Desmosomes / anchoring / adherent junctions

A plaque that forms physical joins between cells and connects the cytoskeletons of adjacent cells.

They spread forces across several cells.

44
Q

Describe this epithelial junction…

A

Tight Junction / Occluding junction

A band like fusion between the cells that does not easily allow molecules to pass through.

They prevent diffusion between cells.

45
Q

Describe this epithelial junction…

A

Gap / communicating junctions

Electrical junctions that allow the transfer of small molecules

They electrically couple adjacent cells.

IMMS phase 1 (9 decks)

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