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From Flashcardlet > Epithelial tissue > Flashcards

Epithelial tissue Flashcards

This flashcard deck was created using Flashcardlet's card creator

0
Q

What is the definition of tissue?

A

A tissue is a group of cells performing similar functions.

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1
Q

The four types of tissue are:

A
  1. Muscle
  2. Nervous
  3. Connective
  4. Epithelial

All cells in the body belong to one of these 4 types of tissues.

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2
Q

Define Extracellular Matrix (EM)

A

Extracellualr Matrix (EM) is a substance produced by the cells of a specific tissue.

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3
Q

What does EM contain?

A

EM may contain:

Protein fibers
Salts
Water
White blood cells
Dissolved micromolecules
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4
Q

Where is EM located?

A

Outside the cells but within a tissue.

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5
Q

What tissue lines every body surface, body cavity and organs?

A

Epithelial Tissue

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6
Q

The majority of glands are derived from…

A

Epithelial Tissue

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7
Q

Epithelial tissue possesses ___________ EM.

A

Little to no

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8
Q

Name the six characteristics of Epithelial tissue.

A
  1. Cellularity
  2. Polarity
  3. Attachment
  4. Avascularity
  5. Innervation
  6. Regeneration
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9
Q

Define the epithelial tissue characteristic of cellularity?

A

Tightly bound cells with little to no EM.

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10
Q

Define the epithelial tissue characteristic of polarity?

A

There is direction to the cells - it has Apical, Basal and Lateral sides.

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11
Q

Define the epithelial tissue characteristic of attachment?

A

The cells are anchored to the basement membrane.

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12
Q

Define the epithelial tissue characteristic of avascularity?

A

The tissue has no blood vessels.

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13
Q

Define the epithelial tissue characteristic of innervation?

A

The tissue has nerve endings or receptors.

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14
Q

Define the epithelial tissue characteristic of regeneration?

A

The tissue’s cells are replaced as quickly as they are lost. This is called mitosis.

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15
Q

What is the Basement Membrane?

A

A specialized structure of epithelium.

16
Q

Where is the basement membrane found?

A

Between the epithelium and underlying connective tissue.

17
Q

What are the two layers of the basement membrane called?

A

Basal lamina and Reticular lamina

18
Q

What are the 3 functions of the basement membrane?

A

To provide physical support, to anchor the epithelium, and to serve as a selective barrier.

19
Q

What cells make the Extracellular matrix?

A

The cells of a specific tissue.

20
Q

How are epithelial cells are strongly bound to each other on their lateral surfaces?

A

With intercellular junctions.

21
Q

What are the four types of intercellular junctions?

A
  1. Tight junctions
  2. Adhering junctions
  3. Desmosomes
  4. Gap junctions
22
Q

Which of the four intercellular junctions does not add much structural support?

A

Gap junctions

23
Q

How do you classify types of epithelial tissue?

A

Number of layers

Shape of cells

24
Q

A simple epithelium is __________.

A

One cell layer thick

25
Q

A stratified epithelium contains _______________.

A

Two or more layers of epithelial cells.

26
Q

What are the three classifications of epithelial tissue based on number of layers?

A

Simple, stratified and pseudostratified epithelium.

27
Q

What are the three classifications of epithelial tissue based on cell shape?

A

Squamous, cuboidal and columnar epithelium.

28
Q

__________ perform a secretory function and are made up of epithelial cells.

A

Glands

29
Q

What do glands secrete?

A

Mucus, hormones, enzymes and waste.

30
Q

Glands can be either ________ or ________.

A

Exocrine or endocrine.

31
Q

Endocrine glands ___________________.

A

…lack ducts and secrete their products directly into the interstitial fluid and bloodstream.

32
Q

Exocrine glands _________________.

A

…possess ducts and their cells secrete products into their ducts.

From Flashcardlet (118 decks)

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