Love
Which of the following is a reason cosmetologist should understand hair and scalp properties
a. identifying hair growth cycles and the differences between common and uncommon hair loss will help when recommending hair loss treatments to the client
B. Identifying the cause of dry or oily scalp
a. identifying hair growth cycles and the differences between common and uncommon hair loss will help when recommending hair loss treatments to the client
all of the fowling are living portions of hair that are below the skin surface EXCEPT
a. the hair bulb
B. the arrector pili muscle
C. the hair follicle D. dermal papilla
the hair follicle
Each of the following is a layer of the hair shaft structure EXCEPT
A. the cortex
B. the hair fiber
C. the hair cuticle D. the medulla
the hair fiber
which portion of the hair root structure supplies nutrients so the the hair can grow?
A. the hair bulb
B. dermal papilla
C. arrector pili D. hair follicle
dermal papilla
which sentence best describes the medulla?
A. the medulla is the hairs most outermost layer
B. the medulla is cone shaped elevation at the base of the hair bulb
C. the medulla is the hairs pith or core
The hair is the hairs pith or core
which layer of the hair shaft provides strength elasticity and color
A. the hair cuticle
B. the hair fiber
C. the medulla D. the cortex
The cortex
what are the major chemical elements that make up human hair?
A. carbon, oxygen, hydrogen, nitrogen, and sulfur
B. amino acids and polypeptide chains
c. proteins, water, lipids and traces of minerals
carbon, oxygen, hydrogen, nitrogen and sulfur
which of the following best describes how a disulfide bond in human hair if formed?
A. amino acids are chemically bonded to each other, end to end
B. Sulfur atoms on neighboring cysteine amino acids within polypeptide chains in the hair join
Sulfur atoms on neighboring cysteine amino acids within polypeptide chains in the hair join
Which of the following is a situation in which a cosmetologist would allow the hair to cool before styling
A. when salt side bonds are being formed by changes in PH during chemical servicing
B. when hydrogen side bonds have been broken by the heat from a curling iron
when hydrogen side bonds have been broken by the heat from a curling iron
what is the outermost layer hair
a. hair follicle
b. hair medulla
c. hair cuticle
d. hair cortex
hair cuticle
if a cosmetologist holds a strand of hair with one hand while sliding the other hands thumb and forefinger from the end of the strand to the clients scalp what component of the the hair is being anaylyzed
a. porosity c. density
b. elasticity d. texture
elasticity
which component of hair is defined as the thickness or diameter of an individual hair strand?
A. porosity
B. elasticity
c. texture D. density
Texture
which of the following can be a cause of dry hair and dry scalp?
A. overactive sebaceous glands
B. inactive sebaceous glands
inactive sebaceous glands
Each of the following is on of the main types of body hair EXCEPT
A. terminal hair
b. lanugo hair
c. vellus hair d. anagen hair
anagen hair
hair is approximately _____percent protein
a. 30
b. 50
c. 70 d. 90
90
The three different types of side bonds that link chains of amino acids together are
A. oxygen, hydrogen and salt
b. ionic, helix, and disulfide
c. hydrogen, salt, and disulfide
hydrogen , salt, and disulfide
what is the phase of the hair growth cycle in which the hair can shed?
A. catagen phase
b. nitrogen phase
c. telogen phase d. anagen phase
Telogen phase
in which phase of the hair growth cycle in which the hair can shed?
A. nitrogen phase
B. telogen phase
c. anagen phase D. catagen phase
catagen phase
a long chain of amino acids linked by peptide bonds is called a ______chain
a. amino-peptide
b. polymer
c. keratin D. polypeptide
polypeptide
The measurement that describes the number of individual hair strands on 1 square inch of the scalp is hair _______
a. porosity C. elasticity
b. diameter D. density
Density
The ability of the hair to absorb moisture is hair____
a. porosity
b. elasticity
c. density
d. saturation
porosity
what type of hair has the largest diameter and usually requires more processing
a. terminal hair c. medium hair
b. coarse hair d. grey hair
coarse hair