QUIZΞZ.NΞT
The scientific study of hair, its diseases, and care is called __________
trichology
The two parts of a mature strand of human hair are the ___________
hair root and hair shaft
The tube-like depression or pocket in the skin or scalp that contains the hair root is the ____________
hair follicle
Hair follicles are NOT found on the __________
soles of the feet
The ________________ is the small, involuntary muscle in the base of the hair follicle
arrector pili muscle
The fatty or oily substance secreted by the sebaceous glands is ____________
sebum
For chemicals to penetrate a healthy cuticle hair layer, they must have ____________
an alkaline pH
The medulla is composed of ____________ cells
round
During the ____________ phase, new hair is produced because new cells are actively manufactured in the hair follicle
anagen
The major elements that make up human hair are carbon, oxygen, hydrogen, __________________
nitrogen, and sulfur
The strong, chemical bonds that join amino acids are called ____________
peptide bonds
Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?
Pheomelanin
Asians tend to have _____________ hair
extremely straight
To help minimize tangles in extremely curly hair when shampooing, you should use ______________
a detangling rinse
Hair texture is classified as _______________
coarse, medium, or fine
The measurement of the number of individual hair strands on one square inch (2.5 square centimeters) of the scalp is ____________
hair density
Compared to hair with high porosity, chemical services performed on hair with low porosity require ______________-
more alkaline solutions
Wet hair with normal elasticity will stretch up to _____________ of its original length and return to that length without breaking
40 percent
Oily hair and scalp can be treated by properly washing with a ______________
conditioning shampoo
Which type of hair almost never has a medulla?
Vellus
During which phase does the follicle canal shrink and detach from the dermal papilla?
Catagen
The average growth of healthy scalp hair is __________
1/2 inch (1.25 centimeters) per month
The technical term used to describe gray hair is _______________
canities
A condition of abnormal growth of terminal hair in areas of the body that normally grow only vellus hair is _________
hypertrichosis
The technical term for dandruff is ______________
pityriasis
Which of the five main structures of the hair root contain the blood and nerve supply that provides the nutrients needed for hair growth?
Dermal papilla
Because there are so many of them, salt bonds account for about ________ of the hair's overall strength
one third
The anagen phase generally lasts from three to five ________________
years
Scalp hair grows ___________________ on women than on men
faster
The ____________________ phase signals the end of the growth phase
catagen
Scalp massage ___________ hair growth
does not increase
Compared to pigment hair, gray hair is_________________
exactly the same
Cross-sections of hair ____________
can be almost any shape
Bad men are commonly perceived as ____________
less successful
By age 35, almost _________________ percent of both men and women show some degree of hair loss
40
Finasteride is an oral prescription medication for hair loss that is meant for ________________
men only
Congenital canities exists ____________
at or before birth
Dandruff can easily be mistaken for ____________
dry scalp
Current research confirms that dandruff is the result of a ______________
fungus
When the livings cells of hair form and begin their journey upward through the hair follicle, they mature in a process called ______________
keratinization
Tinea is characterized by ___________, scales, and sometimes, painful circular lesion
itching
The infestation of the hair and scalp with head lice is called ____________
pediculosis capitis
A carbuncle is similar to a furuncle but is ____________
larger
Fine hair is ____________ than coarse or medium hair
more fragile
Coarse hair ____________
is stronger than fine hair
The _____________ is the outermost layer of the hair
hair cuticle
The oil glands in the skin that are connected to the hair follicles are the ____________
sebaceous
A _______________ bond is a weal, physical, cross-link side bond easily broken by water or heat
hydrogen
Hair is approximately ____________ percent protein
90
Total scalp hair loss is known as ____________
alopecia totalis
Hypertrichosis is also known as ____________
hirsuties
The naturally occurring fungus that causes the symptoms of dandruff when it grows out of control is ______________
malassezia
The ____________ is the lowest part of a hair strand
hair bulb
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