SMP Skin Anatomy & Pigment Theory 2 — Questions and Answers
Question 1: Which layer of the epidermis is responsible for producing new keratinocytes through mitosis?
- Stratum spinosum
- Stratum basale (Correct answer)
- Stratum granulosum
- Stratum lucidum
Correct answer: Stratum basale
The stratum basale is the deepest epidermal layer where keratinocytes actively divide to replenish upper layers.
Question 2: During SMP, depositing pigment too superficially into the stratum corneum will most likely result in:
- Permanent, dark retention
- Rapid pigment fading as the layer sheds (Correct answer)
- Increased risk of scarring
- Blurring of dots over time
Correct answer: Rapid pigment fading as the layer sheds
The stratum corneum constantly sheds (desquamation), so pigment placed there will be lost within days to weeks.
Question 3: What is the primary protein that gives the epidermis its barrier function and mechanical strength?
- Collagen
- Elastin
- Keratin (Correct answer)
- Fibronectin
Correct answer: Keratin
Keratin is the structural protein produced by keratinocytes that forms the tough, waterproof barrier of the epidermis.
Question 4: Fitzpatrick Skin Type VI is best characterized by which of the following?
- Very fair skin that always burns and never tans
- Olive skin that rarely burns
- Dark brown skin that rarely burns
- Deeply pigmented dark brown or black skin that never burns (Correct answer)
Correct answer: Deeply pigmented dark brown or black skin that never burns
Fitzpatrick Type VI describes the deepest skin phototype with rich melanin that provides strong natural UV protection.
Question 5: Which pigment component determines the 'cool' (blue-black) versus 'warm' (red-brown) tones seen in SMP pigments?
- Iron oxide concentration
- Eumelanin vs. pheomelanin ratio analogy in pigment formulation (Correct answer)
- Carbon black particle size
- pH of the pigment carrier
Correct answer: Eumelanin vs. pheomelanin ratio analogy in pigment formulation
SMP pigments mimic natural melanin tones; cooler pigments replicate eumelanin (dark/blue) while warmer ones reflect pheomelanin (red/brown) characteristics.
Question 6: The Langerhans cells found in the epidermis primarily serve as:
- Pigment-producing cells
- Tactile receptor cells
- Antigen-presenting immune cells (Correct answer)
- Keratin-synthesizing cells
Correct answer: Antigen-presenting immune cells
Langerhans cells are dendritic immune cells that detect foreign substances and present antigens to T-lymphocytes.
Question 7: When an SMP technician describes pigment 'migration,' they are referring to:
- Pigment moving through the bloodstream
- Pigment spreading laterally beyond the original dot placement (Correct answer)
- Pigment fading due to UV exposure
- Pigment changing color over time
Correct answer: Pigment spreading laterally beyond the original dot placement
Migration (also called spreading or blurring) occurs when pigment disperses outward from the deposit site, often due to improper depth or oversaturation.
SMP Skin Anatomy & Pigment Theory 2
Which layer of the epidermis is responsible for producing new keratinocytes through mitosis?