Chapter 11 - properties of the hair and scalp Flashcards
What term refers to the scientific study of hair and it’s diseases and care?
Trichology
The Greek word Trichos means
Hair
The hair skin nails and glands are part of the blink system?
Intugementary
What part of the hair is located below the surface of the epidermidis?
Hair root
The pocket to like depression in the scalp or skin that contains the hair root is the hair blank
Follicle
The thick and club like structure that forms the lower part of the hair root is the blank
Hair bulb
A small cone shaped area located at the base of the hair follicle that fits into the hair bulb is the blank
Dermal papilla
What structure contain the blood and nerve supply that provide the nutrients needed for hair growth?
Dermal papillae
The small involuntary muscle fiber in the base of the hair follicle is the?
Arrector pili
The substance secreted by the sebaceous glands is called?
Sebum
What is the oily substance secreted by the skins oil glands and lubricates the hair and skin?
Sebum
The body naturally produces blank of the 20 amino acids that make up hair?
11
What is the outer most layer of the hair?
The cuticle
Which layer of the hair shaft creates the shine and the smooth silky feel of healthy hair?
Hair cuticle
A lengthwise section of hair shows that cuticle scales overlap and each individual cuticle scale is attached to the blank
Cortex
Which term refers to a layer that protects the hair from penetration and prevent damage to her fibers?
Hair cuticle
The fibrous proteins core formed by elongated cells that contains melanin pigment is the blank?
Cortex
The changes involved in oxidation Hair coloring, what setting, thermal styling, permanent waving, and chemical hair relaxing take place within the blank?
Cortex
Hair is composed of protein that grows from cells originating within the blank?
Hair follicle
The hair shaft that emerges from the scalp is a non-living fiber composed of
Keratinized protein
Hair is approximately blank percent Protein
90
The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and so far, often referred to as
COHNS elements
The units of structure that build protein and Are joined together end to end like pop beads are blank
Amino acids
A long chain of amino acids linked by peptide bonds is called a blank chain
Polypeptide
What substances are compromised of long coiled complex polypeptides made of amino acids?
Proteins
The three different types of side bonds that link chains of amino acids together are?
Hydrogen salt and sulfide
A physical side bond that is easily broken by water and heat is a blank bond
Hydrogen
What type of bond is broken by wetting the hair with water and his reformed when the hair dries?
Hydrogen bond
A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a blank bond
Salt
Permanent waving and hair relaxers change the shape of hair by chemically altering the hairs blank?
Disulfide bonds
Hydroxide chemical relaxers break disulfide bonds and convert them to blank bonds?
Lanthionine
All natural hair color is the result of pigment called
Melanin
The pigment that provides brown or black color to hair is blank?
Eumelanin
What pigment in hair provides natural colors ranging from red and ginger to yellow and blonde tones?
Pheomelanin
What term refers to the shape of the hair strand?
Wave pattern
What is the cross-section shape of curly hair?
Oval
Vellus hair is also known as blank hair?
Lanugo
What type of hair is short fine and pigmented and Downy?
Vellus hair
What are the three growth cycles of human hair?
Anagen catagen and telogen
What is the growth phase during which new hair is produced?
Anagen
What is the resting phase or a final phase of the hair cycle that last until the fully grown hair is shed?
Telogen phase
The sudden falling out of hair and round patches or baldness in spots is known as
Alopecia areata
The complete loss of all body hair is known as
Alopecia universalis
The temporary hair loss experience at the end of a pregnancy is called
Post partum alopecia
What is the technical term for gray hair?
Canities
The condition of abnormal hair growth of terminal hair is referred to as
Hypertrichosis
Trichopitilosis Is the technical term for blank?
Split ends
What is the condition that is characterized by brittleness and the formation of nodular swellings along the hair shaft?
Trichorrhexis nodosa
What is the technical term for beaded hair?
Monilethrix
What is the technical term for brittle hair?
Fragilitas crinium
What is the medical term used to describe dandruff?
Pityriasis
Current research confirms that dandruff is the result of a fungus called
Malassezia
What is a severe type of dandruff characterized by an accumulation of greasy or waxy scalp scales mixed with sebum?
Pityriasis steatoides
What is severe form of dandruff is accompanied by redness and inflammation?
Seborrheic dermatitis
What is the medical term for ringworm?
Tinea
Tinea is characterized by itching skills and sometimes painful circular lesions and it’s caused by
Fungal organisms
What is a scalp disorder characterized by dry sulfur - yellow, cup like crusts on the scalp?
Tinea favosa
What is a highly contagious skin disease caused by a parasite called a mite
Scabies
What term refers to an infestation of the hair and scalp with head lice?
Pediculosis capitis
What term refers to an acute localized bacterial infection of the hair follicle that produces constant pain
Furuncle
The thickness or diameter of the individual hair strand is referred to as hair blank
Texture
Which type of hair has the largest diameter and usually requires more processing
Coarse hair
The measurement that describes the number of individual hair strands on one square inch of the scalp is hair blank
Density
The ability of the hair to absorb moisture is hair blank
Porosity
Chemical services performed on here with low porosity require a blank solution
More alkaline
The ability of the hair to stretch and returned to its original lanes without breaking his referred to as hair blank
Elasticity
Hair flowing in the same direction as the result of follicles sleeping in the same direction is known as a
Hair stream
Dry hair and scalp should be treated with products that contain moisturizers and
Emollients
