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1
Q
lanthionine bonds
A
bonds created when disulfide bonds are broken by hydroxide chemical hair
relaxers
2
Q
anagen phase
A
growth phase; new hair is produced
3
Q
polypeptide chain
A
long chain of amino acids linked by peptide bonds
4
Q
cysteine
A
, amino acid with a sulfur (S) atom that joins together two peptide strands
5
Q
catagen phase
A
brief transition period between the growth and resting phases of a hair follicle;
signals the end of the growth phase
6
Q
telogen phase
A
also known as resting phase; the final phase in the hair cycle that lasts until the
fully grown hair is shed
7
Q
side bonds
A
bonds that cross-link polypeptide chains and are responsible for the extreme
strength and elasticity of human hair; account for about one-third of hair’s
overall strength
8
Q
peptide bond
A
also known as an end bond; chemical bond that joins amino acids to each other,
end-to-end, to form a polypeptide chain
9
Q
salt bond