Which epidermal layer is the origin site for new keratinocytes?

Prepare for the VTCT Level 2 Facial and Skincare Test. Revise with flashcards and multiple choice questions, accompanied by insightful explanations. Ace your assessment with confidence!

Multiple Choice

Which epidermal layer is the origin site for new keratinocytes?

New keratinocytes come from the deepest layer of the epidermis where cells are actively dividing to renew the skin. This basal layer sits on the basement membrane and contains keratinocyte stem cells. When these cells divide, their daughter cells stay in this layer to begin life, then are pushed upward as they differentiate through the upper layers. As they move, they flatten and keratinize, eventually becoming the dead cells that form the outermost layer. The dermis lies beneath the epidermis and does not generate keratinocytes. So the origin site for new keratinocytes is the deepest epidermal layer, the basal layer.

New keratinocytes come from the deepest layer of the epidermis where cells are actively dividing to renew the skin. This basal layer sits on the basement membrane and contains keratinocyte stem cells. When these cells divide, their daughter cells stay in this layer to begin life, then are pushed upward as they differentiate through the upper layers. As they move, they flatten and keratinize, eventually becoming the dead cells that form the outermost layer. The dermis lies beneath the epidermis and does not generate keratinocytes. So the origin site for new keratinocytes is the deepest epidermal layer, the basal layer.

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