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Lab Biology > Lab 2: Part 2: Introduction to the Tissues: Epithelial Tissues > Flashcards

Lab 2: Part 2: Introduction to the Tissues: Epithelial Tissues Flashcards

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1
Q

Epithelial Tissue characteristics

A
  • make excellent barriers due to closely packed cells
  • avascular
  • innervated
  • regenerative
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2
Q

avascular

A

contain no blood vessels

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3
Q

innervated

A

connected to the nervous system

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4
Q

regenerative

A

worn out and dead cells continually replaced

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5
Q

Epithelia are classified based on these two criteria:

A
  • Number of layers

- Cell shape

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6
Q

The different layers

A
  • simple
  • pseudostratified
  • stratified
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7
Q

Layer: Simple

A

one layer

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8
Q

Layer: Pseudostratified

A

falsely layered

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9
Q

Layer: Stratified

A

many layers

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10
Q

Shape: Squamous

A

flat (squished looking nucleus)

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11
Q

Shape: Cuboidal

A

cube (perfect circled nucleus)

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12
Q

Shape: Columnar

A

tall (stretched nucleus)

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13
Q

Basal surface

A

bottom edge of the epithelial tissue

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14
Q

Apical surface

A

edge of the epithelial tissues facing the external environment (top)

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15
Q

Simple Squamous function?

A
  • filtration
  • diffusion
  • rapid exchange of materials
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16
Q

Simple Squamous location?

A
  • air sacs of the lungs
  • kidney filtration membranes
  • lines blood vessels
17
Q

Simple Cuboidal function?

A

-secretion

18
Q

Simple Cuboidal location?

A
  • kidney tubules

- glands

19
Q

Simple Columnar function?

A
  • secretion

- absorption

20
Q

Simple Columnar location?

A
  • lining of the spinal cord and brain (ciliated)
  • lines GI tract
  • kidney ducts
21
Q

Pseudostratified Columnar function? (has cilia)

A
  • secretion

- may be ciliated or non-ciliated

22
Q

Pseudostratified Columnar location?

A

-respiratory tract

23
Q

Stratified Squamous function?

A
  • protection (adhesion, water loss, UV radiation)

- 1st line of defense against microbes

24
Q

Stratified Squamous location?

A
  • keratinized found in the superficial (external) layer of skin
  • non-keratinized lines wet surfaces (mouth, esophagus)
25
Q

Transitional function?

A

-stretch to accommodate changes in volume

26
Q

Transitional location?

A

-lines portion of urinary system (e.g. urinary bladder)

Lab Biology (5 decks)

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