NIC Esthetician Written ExamScientific ConceptsHard
A client is undergoing a series of microneedling treatments to stimulate collagen production. The esthetician explains that this treatment induces controlled micro-injuries, prompting the skin's natural wound healing response. Which specific type of cell is primarily responsible for synthesizing new collagen and elastin fibers in the dermal layer?
- ALymphocytes
- BFibroblasts
- CMast cells
- DMacrophages
Show answer & explanationAnswer & explanation
Correct answer: B. Fibroblasts
Fibroblasts are the principal cells of the dermis and are directly responsible for synthesizing collagen, elastin, and extracellular matrix components. Microneedling stimulates these cells to produce new collagen, improving skin texture and firmness.
Why the other options are wrong
- A. Lymphocytes are immune cells involved in specific immune responses, not in the production of structural skin proteins.
- C. Mast cells release histamine and other mediators during inflammatory and allergic reactions, not primarily involved in collagen synthesis.
- D. Macrophages are immune cells involved in phagocytosis (clearing debris) and inflammation modulation during wound healing, but not collagen synthesis.
Fibroblasts
Cells in the connective tissue of the dermis that produce collagen, elastin, and other extracellular matrix components, crucial for skin structure and wound healing.
- Synthesize collagen and elastin
- Maintain extracellular matrix
- Key players in wound healing and anti-aging treatments
Memory trick: Fibroblasts 'Fabricate' the fibers of the dermis.