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Biology > Epithelia > Flashcards

Epithelia Flashcards

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1
Q

Where is simple squamous epithelium found?

A

blood vessels

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2
Q

Where is simple cuboidal epithelium found?

A

kidney tubule

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3
Q

Where is simple columnar epithelium found?

A

GI tract

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4
Q

Where is transitional epithelium found?

A

bladder

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5
Q

Where is stratified squamous epithelium found?

A

skin

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6
Q

Where is stratified cuboidal epithelium found?

A

reproductive system

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7
Q

Where is pseudostratified columnar epithelium found?

A

respiratory

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8
Q

What are the functions of these cells?

A 
exchange 
transporting 
ciliated 
protective 
secretory
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9
Q

What is the structure of exchange cells?

A

1 cell layer - flattened

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10
Q

What is the structure of transporting cells?

A

1 cell layer - cuboidal or columnar

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11
Q

What is the structure of ciliated cells?

A

1 cell layer - cuboidal or columnar

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12
Q

What is the structure of protective cells?

A

many cell layers - flattened

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13
Q

What is the structure of secretory cells?

A

1 or many cell layers - columnar

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14
Q

What do epithelial cell junctions act as?

A

barriers
fences
gates

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15
Q

How do tight junctions determine the function of transporting epithelia?

A

they create apical and basal membrane domains which allows trans-epithelial vectorial transport which creates compartments with different compositions

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16
Q

What are the two ways cell transport can occur in tight junctions?

A

trans-cellularly

paracellularly

17
Q

What is the part of the tight junction that keeps the cell together called?

A

sealing strands

18
Q

What distinguishes leaky and tight epithelial layers?

A

more sealing strands creates a more effective barrier

19
Q

Where can leaky tight junctions be found?

A

kidney

20
Q

Where can tight epithelium be found?

A

bladder

21
Q

What is the function of tight junctions acting as barriers?

A

separate one compartment from another

22
Q

What is the function of tight junctions acting as fences?

A

maintain the asymmetric distribution of lipids and proteins in the apical and basal membranes

23
Q

What is the function of tight junctions acting as gates?

A

allow some molecules to flow more easily than others

Biology (24 decks)

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