Chapter 9
The ______ is the hard protective plate composed mainly of keratin, the fiber-shaped protein found n skin and hair, which is located at the end of the finger or toe.
natural nail
Visible depressions rubbing across the width of the natural nail plate are _________.
Beaus lines
______________ is the scientific study of hair and its diseases and care, which comes from the greek word trichos, meaning hair.
Trichology
Chemical side bonds formed when the sulfur atoms in two adjacent protein chains are joined together.
disulfide bond
The varying degrees of warmth exposed during a permanent color or lightening process is
Contributing pigment (undertone)
Natural nails are appendages of the skin and part of the __________ system, which is make up of the skin and its various organs.
integumentary
A noticeably thin, white nail plate that is much more flexible than normal is knows as _______________
eggshell nail
Tubelike depression or pocket in the skin or scalp that contains the hair root is the _________.
Hair follicle
long chains of amino acids joined together by peptide bonds.
polypeptide chains
Hair that is extremely ___________ can process more quickly and result in a deeper hair color.
porous
Nail plates protect the tips of the fingers and toes, and their appearance can reflect the _______ of the body.
general health
White spots, or ___________ spots, are whitish discolorations of the nails, usually caused by minor injury to the nail matrix.
leukonychia
THe part of the hair root that contains the blood and nerve supply that provides the nutrients needed for hair growth is the ________.
dermal papilla
disulfide bond
Green is an equal combination of _______ and ______.
blue and yellow
Another name for the natural nails is the ____.
onyx
___________ or bitten nails is the result of a person's habit of chewing the nail or the hardened, damaged skin surrounding the nail plate.
Onychophagy
The outermost layer of the hair is the ________.
hair cuticle
____________ waves create a chemical reaction that heats up the waving solution and speeds up the processing.
Exothermic wave
__________ are primary and secondary color positioned directly opposite each other on the color whee.
complementary colors
The natural nail is composed mainly of a protein called ________.
Keratin
The darkening of the fingernails or toenails is ________.
Melanonychia
Together the five elements that make up hair are referred to as _______.
COHNS
Another name for alkaline wave is
cold wave
Pigments in ___________ are large and do not penetrate the cuticle layer, allowing only a coating of color to be deposited and then rinsed away with shampoo.
temporary colors