,_____ of cells are replaced by the body on a daily basis ✔️Ans - Billions
Atoms or molecules with unpaired electrons are called ✔️Ans - free radicals
True or false: Natural antioxidants are found in the skin. ✔️Ans - true
Which of the following causes premature aging of the skin? ✔️Ans -
smoking, tanning, drugs, alchol
Identify the greatest aging effect on the skin: ✔️Ans - UV rays
_____ are called the burning rays. ✔️Ans - UVB
In order to block UVA and UVB rays, sunscreens must be: ✔️Ans - broad
spectrum
Estrogen protects the skin by: ✔️Ans - being anti-inflammatory, repairing
skin tissue, and having antioxidant properties
An esthetician's primary role is to _____ and nourish the skin. ✔️Ans -
preserve, protect
What is the average square footage and weight of an adult's skin? ✔️Ans - 22
sq ft; 8-10 lbs
What does TEWL stand for? ✔️Ans - transepidermal water loss
The most amazing feature of the skin is its ability to: ✔️Ans - heal itself
Which glands excrete perspiration and detoxify the body? ✔️Ans -
sudoriferous
Skin absorbs______ and expels_____ ✔️Ans - oxygen, carbon dioxide
Appendages include: ✔️Ans - hair, nails, sweat and oil glands
Primary functions of the skin include: ✔️Ans - protection and sensation,
heat regulation and secretion, and absorption and excretion
, What does the skin protect against? ✔️Ans - outside elements and
microorganisms
Lipids ✔️Ans - protect cells from dehydration
Mitosis occurs in this layer ✔️Ans - stratum germinativum
two layers of the dermis ✔️Ans - papillary and reticular
The _____ is also referred to as the spiny layer. ✔️Ans - stratum spinosum
Describe the stratum lucidum ✔️Ans - translucent layer that allows sunlight
to pass through the skin
AKA the basal layer ✔️Ans - stratum germinativum
Thickest layer of the skin ✔️Ans - dermis
Cell division ✔️Ans - mitosis
Acid mantle ✔️Ans - protective barrier made up of sebum, sweat, water and
lipids
TEWL ✔️Ans - transepidermal water loss
When outside temperatures change the skin adjusts to ✔️Ans - warm or cool
the body
Sebaceous gland AKA ✔️Ans - oil gland
Epidermis composed of ___ layers ✔️Ans - 5
Layers of the epidermis ✔️Ans - Corneum, Lucidum, Spinosum, Granulosum,
Germinativum
Keratinocyte ✔️Ans - keratin protein cells
Keratin ✔️Ans - protein that makes up the hair, skin and nails
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