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100
The scientific study of hair, its diseases and care is called?
What is trichology
100
The fatty or oily substance secreted by the sebaceous glands is .........................
What is sebum
100
The strong, chemical bonds that join amino acids are called ...................................
What is peptide bonds
100
The measurement of the number of individual hair strands on one square inch of the scalp is .............................
What is hair density
100
During which phase does the follicle canal shrink and detach from the dermal papilla?
What is Catagen
200
The two parts of a mature strand of human hair are the .............. and .....................
What is hair root and hair shaft
200
For chemicals to penetrate a healthy cuticle hair layer, they must have .........................
What is an alkaline pH
200
Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?
What is Pheomelanin
200
Compared to hair with high porosity, chemical services performed on hair with low porosity require ..............................
What is more alkaline solutions
200
The average growth of healthy scalp hair is ...............
What is 1/2 inch per month
300
The tube-like depression or pocket in the skin or scalp that contains the hair root is the .......... ............
What is hair follicle
300
The medulla is composed of .......................... cells
What is round
300
Asians tend to have .............................. hair.
What is extremely straight
300
Wet hair with normal elasticity will stretch up to ........................... of its original length and return to that length without breaking.
What is 50%
300
The technical term used to describe gray hair is ...........................
What is canities
400
Hair follicles are not found on the ......................
What is soles of the feet
400
During the ...................... phase, new hair is produced because new cells are actively manufactured in the hair follicle.
What is anagen
400
To help minimize tangles in extremely curly hair when shampooing, you should use ...............................
What is a detangling rinse
400
Oily hair and scalp can be treated by properly washing with a ....................................
What is normalizing shampoo
400
A condition of abnormal growth of terminal hair in areas of the body that normally grow only vellus hair is .............................
What is hypertrichosis
500
The ............................ is the small, involuntary muscle in the base of the hair follicle.
What is arrector pili muscle
500
The major elements that make up human hair are carbon, oxygen, hydrogen, ..........................
What is nitrogen and sulfur
500
Hair texture is classified as ...............................
What is coarse, medium or fine
500
Which type of hair almost never has a medulla?
What is Vellus
500
The technical term for dandruff is ..........................
What is pityriasis
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