RED
These are the three different types of side bonds that link chains of amino acids together.
What are hydrogen, salt and disulfide?
This is a physical side bond that is easily broken by water and heat.
What is a hydrogen bond?
This type of bond is broken by wetting the hair with water and is reformed when the hair dries.
What is a hydrogen bond?
This is a weak, physical cross-link side bond between adjacent polypeptide chains that is broken by changes in the pH.
What is a salt bond?
Permanent waving and hair relaxers change the shape of hair by chemically altering these bonds in the hair.
What are disulfide bonds?
Hydroxide chemical relaxers break disulfide bonds and convert them to these bonds.
What are lanthionine bonds?
All natural hair color is the result of this pigment.
What is melanin?
This pigment provides brown and black color to the hair.
What is eumelanin?
This pigment in hair provides natural colors ranging from red and ginger to yellow and blond tones.
What is pheomelanin?
This term refers to the shape of the hair strand.
What is wave pattern?
This is the cross-section shape of curly hair.
What is oval?
This is another name for vellus hair.
What is lanugo hair?
This type of hair is short, fine, unpigmented and downy.
What is vellus hair?
These are the three growth cycles of human hair.
What are anagen, catagen and telogen?
This is the growth phase during which new hair is produced.
What is anagen?
This is the resting phase or final phase of the hair cycle that lasts until the fully grown hair is shed.
What is telogen?
This is the sudden falling out of hair in round patches or baldness in spots.
What is alopecia areata?
This is the complete loss of all body hair.
What is alopecia universalis?
This type of temporary hair loss is experienced at the end of a pregnancy.
What is postpartum alopecia?
This is the technical term for gray hair.
What is canities?
This condition is abnormal hair growth of terminal hair.
What is hypertrichosis?
This is the technical term for split ends.
What is trichoptilosis?
This is a condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft.
What is trichorrhexis nodosa?
This is the technical term for beaded hair.
What is monilethrix?
This is the technical term for brittle hair.
What is fragilitas crinium?