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Chemical Composition of Hair
Side Bonds of the Cortex
Hair Pigment
Wave Pattern
Extremely Curly Hair
100
Keratinized Protein
What is the nonliving fiber composed of?
100
hydrogen, salt, and disulfide bonds
What are the three types of side bonds?
100
Eumelanin
What is natural dark brown to black color to hair?
100
wave pattern
Refers to the shape of the hair strand?
100
long twisted spirals
Extremely curly hair grows in?
200
Carbon, oxygen, hydrogen, nitrogen, and sulfur
What are the major elements that make up human hair?
200
hydrogen bond
What is a weak, physical, cross-link side bond that is easily broken by water or heat?
200
Pheomelanin
What is natural colors ranging from red and ginger to yellow and blond tones called?
200
genetics
What is the result of the Natural wave pattern?
200
round cross-section
What is straight hair?
300
amino acids
What are proteins made of?
300
salt bond
What is a weak, physical, cross-link side bond between adjacent polypeptide chains?
300
Eumelanin and pheomelanin
What are two types of Melanin
300
yes
Is it true that cross-sections of straight hair tend to be round and curly?
300
oval to flattened oval cross-section
what is wavy or curly hair?
400
peptide bond
what is the strong, chemical bond that joins amino acids?
400
disulfide bond
What is a strong, chemical, side bond that is very different from the physical side bond of a hydrogen bond or salt bond?
400
Melanin
What are the tiny grains of pigment in the cortex that give natural color?
400
no, not always
Does the shape of the cross-section relate to the amount of curl?
400
flattened cross-section
What is extremely curly hair?
500
polypeptide chain
A long chain of amino acids linked by peptide bonds is called?
500
cystine
What joins together two polypeptide strands?
500
pigment located with in the cortex
What is the result of all natural hair color?
500
none
N/A
500
fine texture
coiled hair usually has what kind of texture?