SMP Skin Anatomy & Pigment Theory 3 — Questions and Answers
Question 1: Merkel cells in the basal layer of the epidermis are associated with:
- Melanin production
- Light touch mechanoreception (Correct answer)
- Immune response
- Keratin cross-linking
Correct answer: Light touch mechanoreception
Merkel cells function as slow-adapting mechanoreceptors, detecting sustained pressure and fine texture details.
Question 2: In SMP color theory, adding more white or lightening agent to a pigment will primarily affect which property?
- Hue
- Saturation (chroma)
- Value (lightness) (Correct answer)
- Temperature
Correct answer: Value (lightness)
Value refers to the lightness or darkness of a color; adding white raises the value, making the pigment lighter.
Question 3: The arrector pili muscles are located in which skin layer?
- Epidermis
- Papillary dermis
- Reticular dermis (Correct answer)
- Hypodermis
Correct answer: Reticular dermis
Arrector pili are smooth muscle bundles anchored in the reticular dermis that contract to cause 'goosebumps' and erect hair follicles.
Question 4: A client with a history of keloid scarring presents for SMP. The primary concern is that:
- Their pigment will fade faster than average
- Needle trauma may trigger abnormal collagen overgrowth (Correct answer)
- Their skin will reject all inorganic pigments
- The epidermis will be too thin for proper pigment retention
Correct answer: Needle trauma may trigger abnormal collagen overgrowth
Keloid-prone individuals may respond to dermal injury with excessive fibroblast activity, producing raised scar tissue at treatment sites.
Question 5: What role does the dermal-epidermal junction (DEJ) play in SMP pigment placement?
- It is the ideal target depth for most SMP pigment deposits (Correct answer)
- It prevents pigment from ascending into the epidermis
- It accelerates pigment breakdown by macrophages
- It serves as a barrier that blocks UV-induced color change
Correct answer: It is the ideal target depth for most SMP pigment deposits
Depositing pigment at or just above the DEJ (upper papillary dermis) provides optimal retention and crisp dot definition for SMP.
Question 6: Which of the following best explains why carbon-based SMP pigments tend to turn bluish-gray over time?
- Carbon oxidizes into a blue compound under UV light
- Macrophages break down large carbon particles, shifting light scatter toward blue wavelengths (Correct answer)
- Carbon reacts with sebum to form a blue pigment
- The epidermis absorbs red wavelengths, leaving only blue reflected light
Correct answer: Macrophages break down large carbon particles, shifting light scatter toward blue wavelengths
Macrophage phagocytosis reduces carbon particle size, causing Tyndall-effect light scattering that makes the residual pigment appear bluish-gray.
Question 7: Sebaceous glands are most densely concentrated in which area of the scalp, which can affect SMP ink retention?
- Occipital region
- Temporal hairline
- Frontal and crown (vertex) region (Correct answer)
- Behind the ears
Correct answer: Frontal and crown (vertex) region
The frontal scalp and crown have the highest density of sebaceous glands, meaning more sebum production that can disrupt pigment retention and cause faster fading.
SMP Skin Anatomy & Pigment Theory 3
Merkel cells in the basal layer of the epidermis are associated with: