Laser Hair Removal Exam Questions with 100% Correct Answers | Verified | Latest Updated 2024/2025

What are the layers of the skin? - Correct Answer-epidermis, dermis, hypodermis What are the 2 classifications of hair? - Correct Answer-Vellus and terminal hair Pulse duration and fluence for fitz 1,2,3 - Correct Answer--Use higher fluences -Shorter pulse duration Pulse duration and fluence for fitz 4,5 - Correct Answer--Use a lower fluence -Use a longer pulse duration Normal systemic changes - Correct Answer--Puberty -Menopause -Pregnancy What are the factors that activate hair growth? - Correct Answer--Increased blood supply to the area (topical stimulation)- accelerates -Hormone stimulation initiates and accelerates What is a chromophore for laser hair removal? - Correct Answer-Melanin Examples of medical laser wavelengths, the different platforms - Correct Answer--Ruby: 694 nm (red light, don't use anymore) -Alexandrite: 755 nm (green light, skin types 1,2,3) -Diode: 800-810 nm (invisible light, skin types 1,2,3,4) -Nd: YAG 1064 nm (neodymium: yttrium-aluminum-garnet) (invisible light, all skin types, not the best but safest for skin types 4 and 5) What are the phases of hair growth - Correct Answer-anagen, catagen, telogen Anagen - Correct Answer--Active hair growth is occurring -in early anagen, the follicle is growing and starting to deepen -Hair is beginning to grow but has not yet reached the surface of the skin -The mid-late anagen follicle has reached its maximum depth. The hair is fully visible terminal hair on the surface of the skin. -The hair shaft bulb is dark or black pigmented and very moist -Dermal papilla directs and supports hair growth, enclosed by hair matrix Catagen - Correct Answer--Brief transitional stage -Last only a few days to a few weeks -Hair folicle seperates from the papilla -The hair shaft bulb is lighter or brown pigmented and lighter -Hair folicle shorts 1/3 of its former length -In late catagen, the thin cord of epidermal cells attaching the dermal papilla to the shrunken hair reacts upwards, followed by underlyin g hair papilla, which also movesz upwards. Telogen - Correct Answer--Resting or dormant period -The papilla has detached from the follicle - a "club" hair is terminal hair that has separated from the papilla that has risen to the top of the follicle. eventually, it falls out -The hair bulb has shrunken, is white, and consists of keratinized hair matrix cells -Sometimes the follicle doesn't go through this phase. Why gray hair does not absorb laser energy? - Correct AnswerGrey hair lacks pigment, or they do not have enough pigment granule, so therefore they cannot absorb enough energy from the laser, even with a higher fluence, the hair and the follicle is not destroyed. An alternate method for permanent hair removal must be advised such as electrolysis or ultrasound hair removal. How is the skin nourished? - Correct Answer-Through blood and lymph 3 types of pigment seen in skin - Correct Answer-Melanin (brown, red, yellow and black pigment) Hemoglobin (red or bluish undertones of the skin) Carotene (gives yellow undertone) pg. 5 professoraxe l Hormone definition and their function - Correct Answer-- Hormones are chemical substances that pass from their glands directly into the bloodstream.