Trichology

The two primary parts of hair are the hair fiber and the:

Hair Root

What is the portion of hair that extends above the skin's surface?

Hair Fiber

The pigment that gives hair its color is found primarily in the:

Cortex

Oil glands are attached to the side of the:

Root Sheath or Follicle

The layer of hair consisting of unique protein structures that give the hair most of its pigment and strength, elasticity is called the:

Cortex

The active growing stage of hair lasts from:

2 to 6 years

The muscle that causes the hair to stand on end when a person is scared or cold is known as the:

Arrector Pili

Hair is made up primarily of:

Protein

Which of the following is known as the active growing stage of hair?

Anagen Stage

The hair growth stage when all cell division stops is the:

Telegon Stage

Human Hair, on the average, grows about:

1/2 1.25cm per month

Cilia is the technical term for:

Eyelash Hair

What is the lack of pigmentation in the hair and skin called?

Albinism

Gray hair is caused by an:

Reduced color pigment, melanin, in the cortex layer of the hair

The degree of coarseness or fineness of the hair fiber is referred to as:

Texture

The number of active hair follicles per square inch on the scalp refers to:

Density

The large variety of hair color is influenced by the amount and distribution of:

Eumelanin and Pheomelanin

Wet hair is able to be stretched to what percent of its length?

40% to 50%

Small cracks starting in the cuticle and splitting the hair entirely are known as brittle hair, fragilitis crinium or:

Trichoptilosis

The ability of the hair to absorb moisture, liquids and chemicals is known as:

Porosity

A condition in which beads or nodes form on the hair shaft is called:

Monilethrix

What is the average amount of daily hair loss:

40 to 100 strands

Long, thick, pigmented hair such as scalp and eyebrow hair is referred to as:

Terminal