100
the substance secreted by the sebaceous glands is called
sebum
Which layer of the hair shaft creates the shine and the smooth, silky feel of healthy hair
hair cuticle
All natural hair color is the result of pigment located in the cortex called
Melanin
The technical term for gray hair Is
canities
total hair loss on the scalp is alopecia________
totalis
A small, cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the
dermal papilla
the medulla, the innermost layer of the hair, is composed of cells that are _______ shaped
round
_________ hair is the is short, fine, and downy hair also known as
vellus
The melanin that provides brown or black color to hair is
Eumelanin
The medical term used to describe dandruff is
pityriasis
the thickened, club-like structure that forms the lower part of the hair root is the
hair bulb
A long chain of amino acids linked by peptide bonds is called a
POLYPEPTIDE CHAIN
The resting phase or final phase of the hair cycle
telogen phase
The sudden falling out of hair in round patches or baldness in spots is alopecia _________
aretea
The _________side bond is easily broken by a change in the pH
SALT
The pocket or tube-like depression in the scalp or skin that contains the hair root is the
hair follicle
The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, often referred to as the
COHNS elements
Trichoptilosis is the technical term for
split ends
A physical side bond that is easily broken by water and heat is a
hydrogen bond
What 3 terms are used to describe hair's wave pattern
straight, curly, extremely curly
the hair, skin, nails, and glands are known collectively as the
integumentary system
The three different types of side bonds are
hydrogen, salt and disulfide
Hydroxide chemical relaxers break disultide bonds and convert them to
lanthionone bonds
The condition of abnormal hair growth of terminal hair is referred to as
hypertrichosis
the three growth cycles of human hair are
anagen, catagen, telogen