Hair Care & Services Exam Study Guide with Complete Solutions
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Course
Hair Care
Institution
Hair Care
Hair Care & Services Exam Study Guide
with Complete Solutions
Trichology - Answer️️ -The scientific study of hair, its diseases, and care.
Shaft - Answer️️ -The portion of the hair that projects above the skin. The
three main layers of the hair shaft are the cuticle, cortex, and the med...
Hair Care & Services Exam Study Guide
with Complete Solutions
Trichology - Answer✔️✔️-The scientific study of hair, its diseases, and care.
Shaft - Answer✔️✔️-The portion of the hair that projects above the skin. The
three main layers of the hair shaft are the cuticle, cortex, and the medulla.
Cuticle - Answer✔️✔️-The outermost layer of the hair. It consists of a single,
overlapping layer of transparent, scale-like cells that overlap like shingles
on a roof.
Cortex - Answer✔️✔️-The middle layer of the hair. It's a fibrous protein core
formed by elongated cells containing the melanin pigment. About 90% of
the total weight of hair comes from the cortex.
Medulla - Answer✔️✔️-The innermost layer, sometimes referred to as the
pith of the hair. It's composed of round cells, and it is common for very fine
and naturally blonde hair to entirely lack a medulla.
Root - Answer✔️✔️-The part of the hair located below the surface of the
scalp. The main structures of the hair root are the follicle, bulb, papilla,
arrector pili muscle, and sebaceous glands.
Follicle - Answer✔️✔️-The tube like depression or pocket in the skin or scalp
that contains the hair root. Hair follicles are distributed all over the body,
except for the hands and the soles of the feet.
Hair Bulb - Answer✔️✔️-The lower area or part of a hair strand. It's the
thickened, club-shaped structure that forms the lower part of the hair root.
Dermal Papilla - Answer✔️✔️-A small, cone-shaped elevation located at the
base of the hair follicle that fits into the hair bulb.The dermal papilla
contains the blood and nerve supply that provides the nutrients needed for
hair growth.
Arrector Pili - Answer✔️✔️-A minute, involuntary muscle fiber in the skin
inserted in the base of the hair follicle. Fear or cold causes it to contract,
which makes the hair stand up straight, resulting in "goose bumps".
Sebaceous Glands - Answer✔️✔️-The oil glands of the skin, connected to the
hair follicles. The sebaceous glands secrete an oily like substance called
sebum, which lubricates the hair and the skin.
COHNS - Answer✔️✔️-Hair is exactly 91% protein. The protein it made up
of long chains of amino acids, which, in turn, are made up of elements.
These elements are carbon (51%), oxygen (21%), hydrogen (6%), nitrogen
(17%), and sulfur (5%).
Porosity - Answer✔️✔️-The degree of porosity is directly related to the
condition of the cuticle layer. Healthy hair with a compact cuticle layer is
naturally resistant to penetration. Porous hair has a raised cuticle layer that
easily absorbs water.
Low Porosity - Answer✔️✔️-Hair with low porosity is considered resistant
hair. Chemical services performed on hair with low porosity require a
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