Understanding Skin Structure and Layers

What is the deepest layer of the epidermis?

• Stratum corneum

• Stratum lucidum

• Stratum basale

• Stratum granulosum

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DOK Level 1: Recall

Which layer of the epidermis is only found in thick, hairless skin?

• Stratum spinosum

• Stratum lucidum

• Stratum granulosum

• Stratum corneum

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DOK Level 1: Recall

What is the primary function of the stratum corneum?

• To produce melanin

• To anchor the epidermis to the dermis

• To prevent water loss from the skin

• To undergo mitosis

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DOK Level 1: Recall

In which layer of the epidermis are melanocytes primarily found?

• Stratum spinosum

• Stratum granulosum

• Stratum basale

• Stratum corneum

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DOK Level 1: Recall

Explain why the stratum spinosum cells become increasingly flatter and more keratinized as they move towards the surface.

• Because they are undergoing mitosis

• Due to the accumulation of melanin

• As a result of the loss of water and nutrients

• Because they are being pushed upward by new cells

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DOK Level 2: Skill/Concept

Which statement best describes the relationship between the stratum basale and the dermis.

• The stratum basale is the outermost layer and is not connected to the dermis.

• The stratum basale lies next to the dermis and has a wavy borderline that anchors them together.

• The stratum basale is a dead layer that forms a barrier with the dermis.

• The stratum basale is a pigment-producing layer that lies above the dermis.

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DOK Level 2: Skill/Concept

What is the role of keratin in the stratum corneum?

• To produce new skin cells

• To provide a protective barrier and prevent water loss

• To anchor the epidermis to the dermis

• To produce melanin

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DOK Level 1: Recall

How does the presence of the stratum lucidum benefit the skin on the palms and soles?

• It provides additional pigmentation.

• It offers extra protection and reduces friction.

• It increases the rate of cell division.

• It enhances the production of melanin.

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DOK Level 2: Skill/Concept

Identify the layer of the epidermis where cells are formed from dead cells of the deeper strata.

• Stratum spinosum

• Stratum granulosum

• Stratum lucidum

• Stratum corneum

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DOK Level 1: Recall

What is the significance of mitosis in the stratum basale?

• It helps in the production of melanin.

• It is crucial for the continuous renewal of the epidermis.

• It anchors the epidermis to the dermis.

• It forms the outermost protective layer.

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DOK Level 2: Skill/Concept