Epidermis Flashcards

0
Q

About 90% of epidermal cells are

A

Keratinocytes

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1
Q

Epidermis is composed of

A

Keratinized stratified squamous epithelium

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2
Q

Keratinocytes

A

Are the predominant cell in the epidermis.

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3
Q

Keratin

A

A tough fibrous protein that helps protect the skin and underlying tissues from abrasions, heat, microbes and chemicals

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4
Q

How many strata or layers in most regions of the body

A

4

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5
Q

The epidermis has four strata or layers called

A

Thin skin

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6
Q

Where exposure to friction is greatest the epidermis has

A

Five layers

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7
Q

When the epidermis has five layers called

A

Thick skin

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8
Q

Layers of thick skin from superficial to deepest

A

(Come Let’s Get Sun Burn). (thick) stratum Corneum, stratum Lucidum, stratum Granulosum, stratum Spinosum, stratum Basale.

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9
Q

Stratum Lucidum is present in

A

Thick skin

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10
Q

Which layer consist on average of 25 to 30 layers of flattened dead keratinocytes?

A

Stratum Corneum

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11
Q

Keratinization

A

When cells move from one epidermal layer to the next they accumulate more and more keratin.

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12
Q

In four to six weeks or about a month the cells form

A

Stratum Basale, rise to the surface, become keratinized and slough off.

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