Laser Technician Prometric Real Exam questions

1. What is the main difference between the dermis and the epidermis?
A. Dermis is avascular while epidermis is vascular
B. Epidermis contains collagen while dermis does not
C. Dermis contains blood vessels; epidermis does not ✅
D. Epidermis is thicker than dermis
Answer: C
Rationale: The dermis is richly supplied with blood vessels, while the epidermis is avascular and relies on diffusion from the dermis for nutrients.

2. Approximately how much collagen is present in the skin’s composition?
A. 10%
B. 30%
C. 50%
D. 70% ✅
Answer: D
Rationale: Collagen makes up around 70–75% of the dry weight of the dermis and provides strength and structure to the skin.

3. What is a keratinocyte?
A. Pigment-producing cell
B. Cell responsible for collagen production
C. Epidermal cell that produces keratin ✅
D. Cell located only in the dermis
Answer: C
Rationale: Keratinocytes are the primary cells of the epidermis, producing keratin to provide a protective barrier.

4. Which laser is commonly used to treat rhinophyma?
A. IPL
B. Nd:YAG
C. CO₂ laser ✅
D. Diode
Answer: C
Rationale: CO₂ laser is effective for vaporizing excess tissue in conditions like rhinophyma due to its precise ablative properties.

5. Which is the shortest phase in the hair growth cycle?
A. Anagen
B. Catagen ✅
C. Telogen
D. Exogen
Answer: B
Rationale: The catagen (transition) phase is the shortest, lasting 1–2 weeks, during which hair growth stops and the follicle shrinks.

6. Which of the following is a sensory nerve?
A. Optic nerve
B. Olfactory nerve
C. Trigeminal nerve ✅
D. Facial nerve
Answer: C
Rationale: The trigeminal nerve is the major sensory nerve of the face, transmitting touch, pain, and temperature sensations.

7. Which tool is commonly used to measure a patient’s pain intensity?
A. Thermometer
B. Visual Analog Scale (VAS) ✅
C. Goniometer
D. Reflex hammer
Answer: B
Rationale: The Visual Analog Scale is a standard tool for assessing pain intensity on a scale from 0 to 10.

8. What is the function of the bulbocavernosus muscle (referred to as billi accureta in question)?
A. Regulates skin temperature
B. Aids in ejaculation and urinary continence ✅
C. Contracts facial muscles
D. Moves the limbs
Answer: B
Rationale: The bulbocavernosus (or bulbospongiosus) muscle plays a role in male ejaculation and assists in urine expulsion.

9. Which is the outermost layer of the epidermis?
A. Stratum granulosum
B. Stratum basale
C. Stratum corneum ✅
D. Stratum spinosum
Answer: C
Rationale: The stratum corneum is the outermost layer of the epidermis, composed of dead, keratinized cells that form a barrier.

10. What is the typical duration of a laser underarm hair removal session?
A. 1–2 minutes
B. 5–10 minutes ✅
C. 15–20 minutes
D. 30–40 minutes
Answer: B
Rationale: Underarm laser hair removal is a quick procedure, typically lasting 5–10 minutes, depending on the device used.

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