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30 Cards in this Set

  • Front
  • Back
The scientific study of hair, its disorders, & care is called:
Trichology


The hair is a threadlike outgrowth of the skin present on the:
Scalp
The chief purpose of hair is to:
Protect & Adorn
Hair is chiefly composed of a horny substance called:
Keratin
Hard keratin is a substance composed of:
Protein
That portion of the hair found beneath the skin surface is called the:
Hair Root
The portion of the hair that extends beyond the skin surface is known as the:
Hair Shaft
The portion of the hair that is not enclosed within the follicle is the:
Hair Shaft
The main structures of the hair root are the:
Follicle, The Bulb, Dermal Papilla, Sebaceous Glands, & Arrector Pili Muscle
A tub like depression in the skin or scalp that encases the hair root is the:
Hair Follicle
The natural flow of the hair as it emerges from the scalp & slants in a particular direction is known as the:
Hair Stream
A club-shaped structure that forms the lower part of the hair root is the:

Hair Bulb

A small, cone-shaped elevation at the base of the hair follicle is called the

Dermal Papilla

Nourishment reaches the hair bulb through the:
Dermal Papilla
Saclike structures with ducts that are attached to each hair follicle are called:
Sebaceous Glands
Glands that secrete sebum to the hair & scalp are called:

Sebaceous Glands

Some factors that influence sebum production are:
Diet & Blood Circulation, Stimulated Endocrine Glands, & Emotional Disturbances & Drugs
An involuntary muscle fiber attached to the underside & base of the hair follicle is the:
Arrector Pili Muscle
The three main layers of the hair shaft are the:
Cuticle, Cortex, & Medulla
The outermost layer of the hair shaft is the:
Cuticle
To penetrate the cuticle layer in order to reach the cortex, a solution must be:
More Alkaline Than The Hair
Changes that take place in the hair during chemical services occur within the:
Cortex
About 90 percent of the total weight of the hair can be traced to the:
Cortex
That portion of the hair that provides strength, elasticity, & natural color is the:
Cortex
The innermost layer of the hair shaft is the:
Medulla


Hair cells mature in the follicle through a process known as:

Keratinization

Hair is made of approximately

91% Protein

The elements found in human hair are:
Carbon, Oxygen, Hydrogen, Nitrogen, & Sulfur (COHNS Elements)
Proteins are made of long chains of chemical units known as:
Amino Acids
Peptide bonds join amino acids:

End to End