1
The three different types of side bonds that link chains of amino acids together are _____.
hydrogen, salt, and disulfide
Hydroxide chemical relaxers break disulfide bonds and convert them to _____ bonds.
lanthionine
What is the cross-section shape of curly hair?
Oval
What is the resting phase or final phase of the hair cycle that lasts until the fully grown hair is shed?
Telogen phase
The condition of abnormal hair growth of terminal hair is referred to as _____.
hypertrichosis
A physical side bond that is easily broken by water and heat is a _____ bond.
hydrogen
All natural hair color is the result of pigment called _____.
melanin
Vellus hair is also known as _____ hair.
lanugo
The sudden falling out of hair in round patches or baldness in spots is known as _____.
alopecia areata
Trichoptilosis is the technical term for _____.
split ends
What type of bond is broken by wetting the hair with water and is reformed when the hair dries?
Hydrogen bond
The pigment that provides brown or black color to hair is _____.
eumelanin
What type of hair is short, fine, unpigmented, and downy?
Vellus hair
The complete loss of all body hair is known as _____.
alopecia universalis
What is a condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft?
Trichorrhexis nodosa
A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a _____ bond.
salt
What pigment in hair provides natural colors ranging from red and ginger to yellow and blond tones?
What pigment in hair provides natural colors ranging from red and ginger to yellow and blond tones?
What are the three growth cycles of human hair?
Anagen, catagen, and telogen
Temporary hair loss experienced at the end of a pregnancy is called _____.
postpartum alopecia
What is the technical term for beaded hair?
Monilethrix
Permanent waving and hair relaxers change the shape of hair by chemically altering the hair’s
disulfide bonds
What term refers to the shape of the hair strand?
Wave pattern
Anagen, catagen, and telogen
Anagen
What is the technical term for gray hair?
Canities
What is the technical term for brittle hair?
Fragilitas crinium