Skin
name a reason cosmetologists should understand skin structure and growth
-answers vary including
-promote safe and effective services
-recommend products
-address potential issues
-ensure clients well being and satisfaction
Which example illustrates the skin's heat regulation function
Sudoriferous glands excrete perspiration
___ helps protect sensitive cells from UV rays
Melanin
Which is a reasonable prediction of an outcome for a client who does not use a broad-spectrum sunscreen with a sun protection factor (SPF) of 15 or higher
collagen and elastin fibers will weaken, and the client's skin will age prematurely
The two types of pigment produced in an individual are _______& ___________
pheomelanin and eumelanin
What is the function of sebaceous glands
To secrete oil to lubricate the skin
Water loss through perspiration is an example of which function of the skin
excretion
These tiny grains of pigment are produced by melanocytes in the stratum germinativum
melanin
The medical branch of science that deals with the study of the skin, its functions, and diseases is ___
Dermatology
A broad-spectrum sunscreen protects against
UVA and UVB radiation from the sun
Which nerve fibers in the skin stimulate muscles
Motor nerve fibers
The layer of skin that is seen and treated by the cosmetologist is the ____
stratum corneum
Which response describes a cause of wrinkles or sagging skin
Collagen fibers lose their strength due to exposure to UV light
Which two structures give the skin strength, form, and flexibility
Collagen and elastin
Lately, a client has noticed body sweat much more than typical in the past. Which situation could explain this increased perspiration
the client is taking a new prescription drug
and or
hormones
Water is the number one nutrient of the body and composes what percentage of the body's skin
50 to 70 percent
What is the function of sudoriferous glands
To excrete sweat to regulate body temperature and eliminate waste products
What is the function of elastin
It gives the skin flexibility and elasticity
Nerve fibers that send messages to the central nervous system and brain to react to heat, cold, touch, pressure, and pain are called ___
Sensory nerve fibers
Fatty tissue found below the dermis is________?
Subcutaneous tissue
A person with very fair skin has less activity in their __________
melanocytes
What is a fibrous protein that is the principal component of hair and nails
Keratin
which layer of the epidermis forms unique fingerprints and footprints and is only located on the palms of the hand, the soles of the feet, and the digits
Stratum Lucidum
The melanin produced by the body that is red to yellow in color is ___
Pheomelanin
what is the outermost and thinnest layer of the skin?
epidermis