NIC Esthetician Written ExamScientific ConceptsMedium
An esthetician is explaining the different types of cells in the epidermis to a client. Which of the following epidermal cells is primarily responsible for the skin's immune function and helps protect against pathogens?
- AMelanocytes
- BMerkel cells
- CKeratinocytes
- DLangerhans cells
Show answer & explanationAnswer & explanation
Correct answer: D. Langerhans cells
Langerhans cells are specialized dendritic cells found in the epidermis that play a crucial role in the skin's immune response by engulfing antigens and presenting them to T-cells.
Why the other options are wrong
- A. Melanocytes produce melanin, which provides pigment and UV protection.
- B. Merkel cells are sensory receptors involved in touch sensation.
- C. Keratinocytes are primarily responsible for producing keratin and forming the skin barrier.
Langerhans Cells
Specialized dendritic cells found in the epidermis that are part of the immune system, acting as antigen-presenting cells.
- Originate from bone marrow.
- Form a network throughout the epidermis.
- Crucial for initiating immune responses to skin pathogens.
Memory trick: K-M-L-M: Keratinocytes make skin, Melanocytes make color, Langerhans fight, Merkel feel.