chapter 11

Question 1

what term refers to the scientific study of hair and its diseases and care?

Answer 1

trichology

Question 2

the greek word troches means what?

Answer 2

hair

Question 3

the hair , skin , nails, and glands are part of the what system?

Answer 3

integumentary

Question 4

what part of the hair is located below the surface of the epidermis?

Answer 4

the hair root

Question 5

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

Answer 5

follicle

Question 6

the thickened, club like structure that forms the lower part of the hair root is the what?

Answer 6

hair bulb

Question 7

a small, cone shaped area located at the base of the hair follicle that fits into the hair bulb is the what?

Answer 7

dermal papilla

Question 8

what structures contain the blood and nerve supply that provide the nutrients needed for hair growth?

Answer 8

dermal papillae

Question 9

the small, involuntary muscle fiber in the base of the hair follicle is the what?

Answer 9

arrector pii

Question 10

The substance secreted by the sebaceous glands is called the what?

Answer 10

sebum

Question 11

what is the oily substance secreted by the skin’s oil glands that lubricates the hair and skin?

Answer 11

sebum

Question 12

the body naturally produces how many of the 20 amino acids that make up hair?

Answer 12

11

Question 13

what is the outermost layer of the hair?

Answer 13

hair cuticle

Question 14

which layer of the hair shaft creates the shine and the smooth, silky feel of the hair

Answer 14

hair cuticle

Question 15

a lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the what?

Answer 15

cortex

Question 16

which terms refers to a layer that protects the hair from penetration and prevents damage to hair fibers?

Answer 16

hair cuticle

Question 17

the fibrous protein core fromed by elongated cells that contains melanin pigment is the what?

Answer 17

cortex

Question 18

the changes involved in oxidation hair coloring, wet setting, thermal styling , permanent waving , and chemical relaxing take place within the what?

Answer 18

cortex

Question 19

hair is composed of protein that grows from cells originating within the what?

Answer 19

hair follicle

Question 20

the hair shaft that emerges from the scalp is a nonliving fiber composed of what

Answer 20

keratinized protein

Question 21

hair is approximately what percent protein

Answer 21

90%

Question 22

the major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen , and sulfur, often referred to as what?

Answer 22

COHNS elements

Question 23

the units of structure that build protein and are joined together end to end like pop beads are what?

Answer 23

amino acids

Question 24

a long chain of amino acids linked by peptide bonds is called a what chain

Answer 24

polypeptide

Question 25

what substance are comprised of long, coiled, complex polypeptides made of amino acids?

Answer 25

proteins

Question 26

the three different types of side bonds that link chains of amino acids together are

Answer 26

hydrogen, salt and disulfide

Question 27

a physical side bond that is easily broken by water and het is a what bond

Answer 27

hydrogen

Question 28

what type of bond is broken by wetting the hair with water and is reformed when the hair dries?

Answer 28

hydrogen

Question 29

a weak , physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a what bond?

Answer 29

salt

Question 30

permanent waving and hair relaxers change the shape of hair by chemically altering the hairs what

Answer 30

disulfide bonds

Question 31

hydroxide chemical relaxers break disulfide bonds and convert them to what bonds

Answer 31

lanthionine

Question 32

all natural hair color is the result of pigment called

Answer 32

melanin

Question 33

the pigment that provides brown or black color to the hair is what

Answer 33

eumelanin

Question 34

what term refers to the shape of the hair strand?

Answer 34

wave pattern

Question 35

what is the cross section shape of curly hair?

Answer 35

oval

Question 36

villus hair is also known as what hair?

Answer 36

lanugo

Question 37

what type of hair is short, fine, unpigmented, and downy?

Answer 37

vellus

Question 38

what are the three growth cycles of human hair

Answer 38

anagen , catagen, and telogen

Question 39

what is the growth phase during which new hair is produced

Answer 39

anagen

Question 40

what is the resting phase or final phase of the hair cycle that lasts until the fully grown hair is shed

Answer 40

telogen

Question 41

the sudden falling out of hair in round patches or baldness in spots is known as what?

Answer 41

alopecia areata

Question 42

temporary hair loss experienced at the end of a pregnancy is called what

Answer 42

postpartum alopecia

Question 43

what is the technical term for gray hair

Answer 43

canities

Question 44

the condition of abnormal hair growth of terminal hair is referred to as

Answer 44

hypertrichosis

Question 45

trichoptilosis is the technical term for what

Answer 45

split ends

Question 46

what si a condition that is characterized by brittleness and the formation of nodular swelling along the hair shaft?

Answer 46

trichorrhexis nodosa

Question 47

what is the technical term for beaded hair

Answer 47

monilethrix

Question 48

what is the technical term for brittle hair

Answer 48

fragilitas crinium

Question 49

what is the medical term used to describe dandruff

Answer 49

pityriasis

Question 50

current research confirms that dandruff is the result of a fungus called

Answer 50

malassezia

Question 51

what is a severe type of dandruff characterized by an accumulation of greasy or waxy scalp scales mixed with sebum?

Answer 51

pityriasis steatoides

Question 52

what severe for of dandruff is accompanied by redness and inflammation

Answer 52

seborrheic dermatitis

Question 53

what is the medical term for ringworm

Answer 53

tinea

Question 54

tine is characterized by itching scales and sometimes painful circular lesions and is caused by what

Answer 54

fungal organisms

Question 55

what is a scalp disorder characterized by dry, sulfur- yellow, cup -like curses on the scalp

Answer 55

tine favosa

Question 56

what is a highly contagious skin disease caused by a parasite called a mite?

Answer 56

scabies

Question 57

what term refers to an infestation of the hair and scalp with head lice

Answer 57

pediculosis capitis

Question 58

what term refers to an acute, localized bacterial infection of the hair follicle that produces constant pain?

Answer 58

furuncle

Question 59

the thickness or diameter of the individual hair strand is referred to as a hair

Answer 59

texture

Question 60

which type of hair has the largest diameter and usually requires more processing?

Answer 60

coarse hair

Question 61

the measurement that describes the number of individual hair strands on one square inch of the scalp is hair?

Answer 61

density

Question 62

the ability of the hair to absorb moisture is hair what?

Answer 62

porosity

Question 63

chemical services performed on hair with low porosity require a what solution?

Answer 63

more alkaline

Question 64

the ability of hair to stretch and return to its original length without breaking is referred to as hair what?

Answer 64

elasticity

Question 65

hair flowing in the same direction, as the result of follicles sloping in the same direction, is known as a what?

Answer 65

hair stream