Hair and Scalp properties
Lubricates the hair and scalp
What is sebum?
Coned shaped elevation at the base of the hair bulb
What is dermal papilla?
The protein that hair is primarily composed of
What is keratin?
Weak bond that is easily broken by water or heat
What are hydrogen bonds?
Refers to the amount of movement or shape of the hair strand
What is wave pattern?
Hair that grows straight up or at a different angle than other hair
What is cowlick?
These glands are attached to the hair follicles
What is sebaceous glands?
Located at the base of the follicle
What is the hair bulb?
The protein building blocks that comprise hair
What are amino acids?
These bonds are broken by changes in pH
What are salt bonds?
The diameter of an individual hair strand
What is hair texture?
Inactive sebaceous glands can cause _____ hair and scalp.
What is dry?
the studyn of hair, including its diseases and care.
What is trichology?
Tubelike structure in the skin or scalp that surrounds the hair root and anchors the hair in the skin
What is the hair follicle?
The process in which cells move up lose their nucleus, and die
What is keratinization?
A strong chemical side bond
What are disulfide bonds?
Measurers the number of individual hair strands on 1 square inch of the scalp
What is hair density?
Overactive sebaceous glands cause ____ hair and scalp
What is oily?
The part of hair located below the epidermis
What is the hair root?
The outermost layer of the hair
what is the hair cuticle?
The major elements that make up hair are also referred to as ___________
What are the COHNS elements?
Hydroxide chemical hair relaxers break disulfide bonds and convert them to________________
What are lanthionine bonds?
Refers to hair's ability to absorb moisture
What is hair porosity?
short fine hair that covers a fetus
What is lanugo hair?
The hair follicle, hair bulb, and dermal papilla found below the skin
What is the living portion of hair?
The fibrous protein layer of the hair
What is the cortex?
A very strong chemical bond that joins amino acids together
What are peptide bonds?
Pigment that gives hair its natural color
What is melanin?
The hair's ability stretch and return
What is hair elasticity?
Short fine unpigmented body hair often referred to as peach fuzz
What is vellus hair?
Projects above the epidermis
What is the hair shaft?
The hair's pith or core, not all hair have this
What is the medulla?
Long chain of peptide bonds
What are polypeptide chains?
Predominant pigment in black and brunette hair
What is eumelanin?
Hair flowing in the same direction caused by follicles sloping in the same direction
What is hair stream?
Long pigmented hair on the scalp and body
What is terminal hair?
Involuntary muscle attached to the hair follicle
What is the arrector pili muscle?
the hair cuticle, cortex, and medulla
What is the shaft structure?
Hydrogen, salt, and disulfide bonds are the three types of
What are side bonds?
The yellow to red pigment in natural blonde and red shades of hair
What is pheomelanin?
Occurs when hair leaves the follicle at an angle
What is a whorl?
The hair growth cycle features three phases
What are anagen, catagen, and telogen phases?