skin structure and growth Flashcards
what are the reasons that cosmetologists should understand skin structure
diagnosing and providing treatment for abnormal skin conditions and diseases that requires knowledge of structure and growth
the medical branch of science that deals with the study of skin, its functions and diseases
dermatology
which layer of the epidermis forms unique fingerprints and footprints and is only located on the palms of the hands, the soles of the feet and the digits
stratum lucidum
what gives the body smoothness and contour while providing a protective cushion for the skin
subcutaneous tissue
the layer of skin that is seen and treated by the cosmetologist is the
stratum corneum
what is a fibrous protein that is the principal component of hair and nails
keratin
nerve fibers that send messages to the central nervous system and brain to react to heat, cold, touch, pressure and pain
sensory nerve fibers
which nerve fibers in the skin stimulate muscles
motor nerve fibers
what defines melanin
tiny grains of pigment produced by melanocytes in your stratum germativum
what best defines the difference between pheomelanin and eumelanin in the skin
predominantly pheo - rosier skin
predominantly eu - cooler tone skin
the melanin produced by the body that is red to yellow in color
pheomelanin
this helps protect sensitive cells from UV rays
melanin
a broad spectrum sunscreen is one that does this
protects against UVA and UVA
what best describes a cause for wrinkles and sagging skin
collagen fibers lose their strength due to exposure
which 2 structures give the skin strength, form, and flexibility
collagen and elastin
what is the main function of elastin
gives skin flexibility and elasticity
if someone is experiencing a lot of new wrinkles, what could possibly be causing it
being outside more, new exposure to cold and heat
what is the function of the sebaceous glands
to secrete oil, to lubricate the skin
what is the function of sudoriferous glands
sweat to make you cool down, eliminates wastes and toxins
what could explain why someone is noticing more body sweat than usual
new medication
what is a good illustration of what happens when the skin is regulating heat
sudoriferous glands excrete perspiration
what are some of the skins defense mechanisms
hydrolipidic film prevents drying out, PH of your acid mantle protects from pathogens, sebum secreted protects from external dangers
how much water does the human body comprised of
50-70%
water loss through perspiration is what function of the skin
excretion
what could happen to a persons skin if they do not use a reasonable broad spectrum sunscreen with SPF 15 or higher
collagen and elastin will weaken which can cause premature aging
