NIC Cosmetology Written (Theory) ExamScientific ConceptsMedium
A cosmetologist is preparing a client for a chemical exfoliation treatment. The treatment aims to remove dead skin cells from the outermost layer of the epidermis. Which layer of the skin is the primary target of this treatment?
- AStratum spinosum
- BStratum granulosum
- CStratum lucidum
- DStratum corneum
Show answer & explanationAnswer & explanation
Correct answer: D. Stratum corneum
The stratum corneum is the outermost layer of the epidermis, composed of dead, flattened skin cells, making it the primary target for exfoliation treatments designed to remove these superficial cells.
Why the other options are wrong
- A. The stratum spinosum is a deeper layer of the epidermis, involved in cell adhesion and immune response.
- B. The stratum granulosum is a deeper layer of the epidermis, involved in keratinization and lipid production.
- C. The stratum lucidum is a clear layer found only in thick skin like palms and soles, and is not the outermost layer everywhere.
Stratum Corneum
The outermost layer of the epidermis, consisting of dead, flattened keratinocytes, providing a protective barrier.
- Primary target for exfoliation treatments.
- Acts as the skin's main barrier against environmental damage and water loss.
- Cells are continuously shed and replaced from below.
Memory trick: Come, Let's Get Sun Burned! (Corneum, Lucidum, Granulosum, Spinosum, Basale)