PIRCTC 102.14 Hair Theory

If the amount of pheomelanin is very concentrated and near the cuticle layer, the hair color will appear more:

• red

• black

• brown

• yellow

What helps protect the hair and skin from becoming too dry?

• sebum

• hair fiber

• protofibrils

• primitive hair germ

The active growing stage of hair lasts from:

• 6 months to 1 year

• 2 to 6 years

• 12 to 16 years

• 24 to 50 years

Which large hair structure is located at the base of the hair follicle?

• tube

• base

• papila

• medulla

Human hair, on the average, grows about:

• 1/4" per month

• 1" per month

• 1/2" per month

• 1 1/2" per month

The diameter of a hair fiber will be the same as:

• the length of the root sheath

• one-half the size of the root sheath

• the size of the arrector pili muscle

• the inside diameter of the hair follicle

What is the natural flow or wave pattern of hair determined by?

• the size of the follicle

• the shape of the head

• the number of follicles

• the angle of the follicle

The three major layers of the hair are the medulla, cortex, and

• cuticle

• papilla

• hair bulb

• sebaceous glands

Hair color is influenced by:

• hair follicles

• thick and fine hair

• coarse and medium hair

• eumelanin and pheomelanin

What determines the shape of the hair shaft as it grows?

• the shape of the cuticle

• the shape of the medulla

• the shape of the hair ofllicle

• the angle of the hair follicle