Properties Of The Hair And Scalp

Front 1

The scientific study of hair, its diseases, and care is called

Back 1

trichology

Front 2

The two parts of a mature strand of human hair are the

Back 2

hair root and hair shaft

Front 3

The tube-like depression or pocket in the skin or scalp that contains the hair root is the

Back 3

hair follicle

Front 4

Hair follicles are not found on the

Back 4

soles of the feet

Front 5

The _______ is the small, involuntary muscle in the base of the hair follicle.

Back 5

arrector pili muscle

Front 6

The fatty or oily substance secreted by the sebaceous glands is _________.

Back 6

sebum

Front 7

For chemicals to penetrate a healthy cuticle hair layer, they must have ________.

Back 7

an alkaline pH

Front 8

The medulla is composed of _________ cells.

Back 8

round

Front 9

During the ________ phase, new hair is produced because new cells are actively manufactured in the hair follicle.

Back 9

anagen

Front 10

The major elements that make up human hair are carbon, oxygen, hydrogen, ____________.

Back 10

nitrogen and sulfur

Front 11

The strong, chemical bonds that join amino acids are called __________.

Back 11

peptide bonds

Front 12

Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?

Back 12

pheomelanin

Front 13

Asians tend to have __________ hair.

Back 13

straight

Front 14

To help minimize tangles in extremely curly hair when shampooing, you should use __________.

Back 14

a detangling rinse

Front 15

Hair texture is classified as _________.

Back 15

coarse, medium, or fine

Front 16

The measurement of the number of individual hair strands on one square inch (2.5 square centimeters) of the scalp is __________.

Back 16

hair density

Front 17

Compared to hair with high porosity, chemical services performed on low porosity hair require __________.

Back 17

more alkaline solutions

Front 18

Wet hair with normal elasticity will stretch up to ___________ of its original length and return to that length without breaking.

Back 18

50 percent

Front 19

Oily hair and scalp can be treated by properly washing with a _________.

Back 19

normalizing shampoo

Front 20

Which type of hair almost never has a medulla?

Back 20

vellus

Front 21

During which phase does the follicle canal shrink and detach from the dermal papilla?

Back 21

catagen

Front 22

Scalp massage _________ hair growth.

Back 22

does not increase

Front 23

Compared to pigmented hair, gray hair is __________.

Back 23

exactly the same

Front 24

Cross-sections of hair __________.

Back 24

can be almost any shape

Front 25

Bald men are commonly perceived as ___________.

Back 25

less successful

Front 26

By age 35, almost _______ percent of both men and women show some degree of hair loss

Back 26

40

Front 27

The average growth of health scalp hair is ________.

Back 27

1/2 inch (1.25 centimeters) per month

Front 28

The technical term used to describe gray hair is _________.

Back 28

cantities

Front 29

A condition of abnormal growth of terminal hair in areas of the body that normally grow only vellus hair is _________.

Back 29

hypertrichosis

Front 30

The technical term for dandruff is _________.

Back 30

pityriasis

Front 31

Which of the five main structures of the hair root contain the blood and nerve supply that provides the nutrients needed for hair growth ?

Back 31

dermal papilla

Front 32

Because there are so many of them, salt bonds account for about __________ of the hair’s overall strength.

Back 32

one-third

Front 33

The anagen phase generally lasts from three to five _________.

Back 33

years

Front 34

Scalp hair grows __________ on women and men.

Back 34

faster

Front 35

The __________ phase signals the end of the growth phase.

Back 35

catagen

Front 36

Finasteride is an oral prescription medication for hair loss that is meant for ___________.

Back 36

men only

Front 37

The ___________ is the outermost layer of the hair.

Back 37

hair cuticle

Front 38

The oil glands in the skin that are connected to the hair follicles are the _________ glands.

Back 38

sebaceous

Front 39

A _________ bond is a weak, physical, cross-link side bond easily broken by water or heat.

Back 39

hydrogen

Front 40

Hair is approximately _____ percent protein.

Back 40

90

Front 41

Total scalp hair loss is known as __________________.

Back 41

alopecia totalis

Front 42

Congenital canities exists _____________.

Back 42

at or before birth

Front 43

Dandruff can easily be mistaken for _________.

Back 43

dry scalp

Front 44

Current research confirms that dandruff is the result of a ________.

Back 44

fungus

Front 45

When the living cells of hair form and begin their journey upward through the hair follicle, they mature in a process called __________.

Back 45

keratinization

Front 46

Tinea is characterized by ____________, scales, and sometimes painful circular lesions.

Back 46

itching

Front 47

The infestation of the hair and scalp with head lice is called _________.

Back 47

pediculosis capitis

Front 48

A carbuncle is similar to a furuncle but is ________.

Back 48

larger

Front 49

Fine hair is _________ than coarse or medium hair.

Back 49

more fragile

Front 50

Coarse hair ________.

Back 50

is stronger than fine hair

Front 51

Hypertrichosis is also known as ____________.

Back 51

hirsuties

Front 52

The technical term for knotted hair is __________________.

Back 52

trichorrhexis nodosa

Front 53

The __________ is the innermost layer of the hair and is composed of round cells.

Back 53

medulla

Front 54

When hair leaves the follicles at an angle and forms patterns or streams on the head, it is called ____________.

Back 54

a whorl

Front 55

The part of the hair located below the surface of the epidermis is the _________.

Back 55

hair root

Front 56

A particular pattern of hair stream that is usually more noticeable on the front hairline in people with short, thick hair is a __________.

Back 56

cowlick

Front 57

The ability of the hair to absorb moisture is called ___________.

Back 57

hair porosity

Front 58

The middle laver of the hair is the _________.

Back 58

cortex

Front 59

An autoimmune disorder that causes the affected hair follicles to be mistakenly attacked by a person's own immune system is __________.

Back 59

alopecia areata

Front 60

Vellus hair is also known as _________.

Back 60

lunuga hair

Front 61

The technical term for ringworm is ________.

Back 61

tinea

Front 62

The naturally occurring fungus that causes the symptoms of dandruff when it grows out of control is _________.

Back 62

malassezia

Front 63

‘

Back 63

‘

Front 64

The _________ is the lowest part of a hair strand.

Back 64

hair bulb

Front 65

The technical term for beaded hair is ____________.

Back 65

monilethrix

Front 66

A highly contagious skin disease caused by a parasite called a mite that burrows under the skin is __________.

Back 66

scabies

Front 67

The term for the spiral shape of a coiled protein is _________.

Back 67

helix

Front 68

Shaving, clipping, and cutting the hair on the head __________.

Back 68

has no effect on hair growth

Front 69

Dry, sulfur-yellow, cuplike crusts on the scalp are called __________.

Back 69

scutula

Front 70

The ___________ are part of the integumentary system.

Back 70

hair, skin, nails, and glands

Front 71

The long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of males and females is called __________.

Back 71

terminal hair