Skin Structure
What is the layer of skin we see and treat in the treatment room?
Epidermis
The skin’s ability to maintain internal balance is known as what?
Homeostasis
Which cells produce keratin?
Keratinocytes
What is the ingredient that causes a product to spread and gives it slip?
Emollient
This popular cosmetic procedure uses botulinum toxin to temporarily reduce muscle movement and soften expression lines.
Botox
What is the deeper layer of skin that contains collagen, elastin, and blood vessels?
Dermis
What skin function involves the release of sweat to regulate temperature?
Excretion/ Thermal Regulation
Which layer of the epidermis contains melanocytes?
Stratum germinativum (basal layer)
Water and oil are kept together with what kind of ingredient?
Emulsifier
This light-based therapy uses wavelengths such as red or blue light to reduce acne, inflammation, and promote healing.
LED
What is the outermost layer of the epidermis called?
Stratum Corneum
What pigment is produced to protect skin from UV radiation?
Melanin
What is the clear, transparent layer found on the palms and soles?
Stratum lucidum
Ingredients listed on a product label appear in what order?
Descending order of predominance
This exfoliating cosmetic treatment uses a solution of acids—often glycolic, salicylic, or lactic—to dissolve dead skin cells and improve texture.
Chemical Peel
What structure produces sebum?
Sebaceous Glands
What function involves absorbing products and allowing certain ingredients to penetrate the skin?
Absorption
Collagen and elastin fibers are found primarily in what part of the skin?
Reticular layer of the Dermis
What type of ingredient attracts water to the skin?
Humectant
Often performed in medical settings, this laser-based treatment targets unwanted hair by damaging the follicle with controlled light energy.
Laser hair removal
What protective lipid barrier prevents TEWL (transepidermal water loss)?
Barrier Function
What layer of the epidermis contains the immune cells known as Langerhans cells?
Stratum Spinosum
What is the process where keratinocytes migrate upward, drying and forming the stratum corneum?
Cell Turnover/ Keratinization
The FDA requires what document for cosmetic labeling and safety regulations?
INCI (International Nomenclature of Cosmetic Ingredients)
A treatment often combined with peels or facials, this device uses ultrasonic vibration to loosen debris and enhance product penetration.
Ultrasonic Spatula