OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
Cuticle - (ANSWER)Outer most layer of the hair. It consists of a single, overlapping layer of transparent,
scale-like cells that resemble shingles on a roof. It protects the inner cortex layer and contributes to 20%
of overall strength of hair.
The Cortex - (ANSWER)The middle layer of the hair. A fibrous protein core formed by elongated cells
containing melanin to pigment. Gives hair majority of its strength and elasticity. A healthy Cortex
contributes to %80 to the overall strength of the hair. Contains melanin that determines hair color.
The Medulla - (ANSWER)The innermost layer of hair. Sometimes absent from hair and doesn't play a role
in hair coloring. composed of round cells.
Texture - (ANSWER)The diameter of an individual hair.
Density - (ANSWER)The number of hairs per square inch.
Porosity - (ANSWER)The hairs ability to absorb moisture.
Low porosity - (ANSWER)The cuticle is tight. The hair is resistant (difficult for moisture or chemicals to
penetrate. Thus, it requires longer processing time.
Average porosity - (ANSWER)The cuticle is slightly raised. Hair is normal and processes in an average
amount of time.
High porosity - (ANSWER)The cuticle is lifted. The hair is overly porous and takes color quickly (also fades
quickly) Permed, colored, chemically relaxed and straightened hair will have a high degree of porosity.
Mixed melanin - (ANSWER)A combination of natural hair color that contain both pheomelanin and
eumelanin.
Basal cell cercinoma - (ANSWER)Most common and least severe type of skin cancer; often characterized
by light or pearly nodules.
,OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
Bromhidrosis - (ANSWER)Foul-smelling perspiration, usually noticeable in the armpits and the feet that
is caused by Bacteria.
Bulla (plural bullae - (ANSWER)Large blister containing a watery fluid; similar to vesicle but larger.
Chloasma - (ANSWER)Aka-Liver Spots; condition characterized by hyperpigmentation on the skin in
spots that are not elevated.
Closed Comedo - (ANSWER)Aka-White head; hair follicle is closed and not exposed to the environment.
Sebum remains a white or cream color and comedone appears as a small bump just under the skin
surface.
Conjunctivitis - (ANSWER)Aka-Pink eye; common bacterial infection of the eyes. Extremely contagious.
Contact dermatitis - (ANSWER)An inflammation of the skin caused by Having contact with certain
chemicals or substances. Many that are used in cosmetology.
Crust - (ANSWER)Dead cells form over a wound or blemish while it's healing; an accumulation of sebum
and pus, sometimes mixed with epidermal material.
Cyst - (ANSWER)Closed, abnormally developed that contains fluid, pus, semifluid, or morbid matter
above or below the skin.
Hair Root - (ANSWER)The part of the hair located below the surface of the Epidermis.(outer layer of the
skin).
Hair Shaft - (ANSWER)The portion of hair that projects above the Epidermis.
Dermatitis - (ANSWER)Inflammatory condition of the skin.
,OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
Hair Follicle - (ANSWER)The tube-like depression or pocket in the skin or scalp that contains the hair
root.
Hair bulb - (ANSWER)The lowest part of the hair strand. The thickened. Club-shaped structure that forms
the lower part if the hair root.
Arrector pili muscle - (ANSWER)The small, involuntary muscle in the base of the hair follicle. (The reason
for goose bumps).
Dermal papilla - (ANSWER)A small cone-shaped elevation located at the base of the hair follicle that fits
into the hair bulb. (Plural: dermal papillae)
Dyschromias - (ANSWER)Abnormal colorations of the skin that accompany many skin disorders and
systemic disorders.
Eczyma - (ANSWER)An inflammatory, uncomfortable, and often chronic disease of the skin characterized
by moderate to severe inflammation, scaling and sometimes severe itching.
Excoriation - (ANSWER)Skin sore or abrasion produced by scratching or scraping.
Extrinsic Factors - (ANSWER)Primarily environmental factors that contribute to aging and the
appearance of aging.
Sebaceous glands - (ANSWER)Oil glands in the skin and scalp that secrete sebum .
Keratinization - (ANSWER)Process of creating keratin protein. A non-living fiber.
Fissure - (ANSWER)A crack in the skin that penetrates the dermis. Example severely cracked hands/lips.
, OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
COHNS elements - (ANSWER)The major elements that make up human hair are : Carbon, Oxygen,
Hydrogen, Nitrogen, and Sulfur
Amino acids - (ANSWER)Units that are joined together end to end like pop beads creating long chains of
protein .
Peptide bond - (ANSWER)A strong chemical bond that joins amino acids also known as an "end bond".
Proteins - (ANSWER)Long, coiled complex polypeptides made of amino acids.
Polypeptide chain - (ANSWER)A long chain of amino acids linked by peptide bonds.
Hydrogen bond - (ANSWER)A weak, physical, cross-linking side bond easily broken By water or heat.
Salt Bond - (ANSWER)A weak physical cross link bond between adjacent polypeptide chains. They
depend on pH so they're easily broken by strong alkaline or acidic solutions.
Disulfide Bond - (ANSWER)A strong, chemical side bond that is different from the physical side bond of a
Hydrogen or salt bond.
Wave Pattern - (ANSWER)The shape of the hair strand. Can be described as straight, curly, extremely
curly.
Vellus hair - (ANSWER)Aka-"lanugo hair* is short, fine, unpigmented and downy hair that appears on the
body.
Terminal Hair - (ANSWER)Long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of
males and females. Coarser than vellus hair.
Anagen Phase - (ANSWER)Aka-"Growth Phase" where new hair is produced.
Cuticle - (ANSWER)Outer most layer of the hair. It consists of a single, overlapping layer of transparent,
scale-like cells that resemble shingles on a roof. It protects the inner cortex layer and contributes to 20%
of overall strength of hair.
The Cortex - (ANSWER)The middle layer of the hair. A fibrous protein core formed by elongated cells
containing melanin to pigment. Gives hair majority of its strength and elasticity. A healthy Cortex
contributes to %80 to the overall strength of the hair. Contains melanin that determines hair color.
The Medulla - (ANSWER)The innermost layer of hair. Sometimes absent from hair and doesn't play a role
in hair coloring. composed of round cells.
Texture - (ANSWER)The diameter of an individual hair.
Density - (ANSWER)The number of hairs per square inch.
Porosity - (ANSWER)The hairs ability to absorb moisture.
Low porosity - (ANSWER)The cuticle is tight. The hair is resistant (difficult for moisture or chemicals to
penetrate. Thus, it requires longer processing time.
Average porosity - (ANSWER)The cuticle is slightly raised. Hair is normal and processes in an average
amount of time.
High porosity - (ANSWER)The cuticle is lifted. The hair is overly porous and takes color quickly (also fades
quickly) Permed, colored, chemically relaxed and straightened hair will have a high degree of porosity.
Mixed melanin - (ANSWER)A combination of natural hair color that contain both pheomelanin and
eumelanin.
Basal cell cercinoma - (ANSWER)Most common and least severe type of skin cancer; often characterized
by light or pearly nodules.
,OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
Bromhidrosis - (ANSWER)Foul-smelling perspiration, usually noticeable in the armpits and the feet that
is caused by Bacteria.
Bulla (plural bullae - (ANSWER)Large blister containing a watery fluid; similar to vesicle but larger.
Chloasma - (ANSWER)Aka-Liver Spots; condition characterized by hyperpigmentation on the skin in
spots that are not elevated.
Closed Comedo - (ANSWER)Aka-White head; hair follicle is closed and not exposed to the environment.
Sebum remains a white or cream color and comedone appears as a small bump just under the skin
surface.
Conjunctivitis - (ANSWER)Aka-Pink eye; common bacterial infection of the eyes. Extremely contagious.
Contact dermatitis - (ANSWER)An inflammation of the skin caused by Having contact with certain
chemicals or substances. Many that are used in cosmetology.
Crust - (ANSWER)Dead cells form over a wound or blemish while it's healing; an accumulation of sebum
and pus, sometimes mixed with epidermal material.
Cyst - (ANSWER)Closed, abnormally developed that contains fluid, pus, semifluid, or morbid matter
above or below the skin.
Hair Root - (ANSWER)The part of the hair located below the surface of the Epidermis.(outer layer of the
skin).
Hair Shaft - (ANSWER)The portion of hair that projects above the Epidermis.
Dermatitis - (ANSWER)Inflammatory condition of the skin.
,OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
Hair Follicle - (ANSWER)The tube-like depression or pocket in the skin or scalp that contains the hair
root.
Hair bulb - (ANSWER)The lowest part of the hair strand. The thickened. Club-shaped structure that forms
the lower part if the hair root.
Arrector pili muscle - (ANSWER)The small, involuntary muscle in the base of the hair follicle. (The reason
for goose bumps).
Dermal papilla - (ANSWER)A small cone-shaped elevation located at the base of the hair follicle that fits
into the hair bulb. (Plural: dermal papillae)
Dyschromias - (ANSWER)Abnormal colorations of the skin that accompany many skin disorders and
systemic disorders.
Eczyma - (ANSWER)An inflammatory, uncomfortable, and often chronic disease of the skin characterized
by moderate to severe inflammation, scaling and sometimes severe itching.
Excoriation - (ANSWER)Skin sore or abrasion produced by scratching or scraping.
Extrinsic Factors - (ANSWER)Primarily environmental factors that contribute to aging and the
appearance of aging.
Sebaceous glands - (ANSWER)Oil glands in the skin and scalp that secrete sebum .
Keratinization - (ANSWER)Process of creating keratin protein. A non-living fiber.
Fissure - (ANSWER)A crack in the skin that penetrates the dermis. Example severely cracked hands/lips.
, OREGON BARBER LICENSE EXAM 2025 WITH 100% ACCURATE ANSWERS
COHNS elements - (ANSWER)The major elements that make up human hair are : Carbon, Oxygen,
Hydrogen, Nitrogen, and Sulfur
Amino acids - (ANSWER)Units that are joined together end to end like pop beads creating long chains of
protein .
Peptide bond - (ANSWER)A strong chemical bond that joins amino acids also known as an "end bond".
Proteins - (ANSWER)Long, coiled complex polypeptides made of amino acids.
Polypeptide chain - (ANSWER)A long chain of amino acids linked by peptide bonds.
Hydrogen bond - (ANSWER)A weak, physical, cross-linking side bond easily broken By water or heat.
Salt Bond - (ANSWER)A weak physical cross link bond between adjacent polypeptide chains. They
depend on pH so they're easily broken by strong alkaline or acidic solutions.
Disulfide Bond - (ANSWER)A strong, chemical side bond that is different from the physical side bond of a
Hydrogen or salt bond.
Wave Pattern - (ANSWER)The shape of the hair strand. Can be described as straight, curly, extremely
curly.
Vellus hair - (ANSWER)Aka-"lanugo hair* is short, fine, unpigmented and downy hair that appears on the
body.
Terminal Hair - (ANSWER)Long, coarse, pigmented hair found on the scalp, legs, arms, and bodies of
males and females. Coarser than vellus hair.
Anagen Phase - (ANSWER)Aka-"Growth Phase" where new hair is produced.
