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

The active growing stage of hair lasts from:

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

Human hair, on the average, grows about:

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

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

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

Hair color is influenced by:

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

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

The lips, soles of the feet, palms of the hands, and eyelids do not have:

The follicle in straight hair is typically:

The central core of the hair shaft sometimes missing in fine or very fine hair is the:

Hair that has been pulled out from the roots can grow back under which of the following circumstances?

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

The resting stage of hair growth when the hair bulb has no attached root sheath if referred to as the:

The technical name for the hair of the eyebrows is known as:

Gray hair is sometimes referred to as:

What is the transitional stage of the hair growth cycle?

Mitosis takes place in the area of the hair bulb called the:

The technical name for the hair of the head is known as:

Stimulation of the onset of the telogen stage or causing the production of abnormal, brittle hairs can be caused by:

The process of hair turning gray is most commonly caused by:

What is the outer covering of the hair shaft, made up of overlapping layers of transparent scales?

In which layer of the hair strand does the melanin of the hair exist?

People with lighter colored hair have melanin in the:

The cross-section, or diameter, of the hair shaft is much larger in coarse hair than:

The acid mantle maintains the natural pH of hair and skin and protects the:

What is formed when sebum produced by the oil glands mixes with the body's perspiration?

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

The hair bulb itself is nearly doubled back over the follicle in a growth shape resembling a golf club in:

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

Hair color is darker during which stage of growth?

The hard, resistant layer of protein that protects the hair shaft is the:

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

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

When looking through a microscope, which portion of the hair would display living cells?

Eumelanin is the type of melanin that produces:

The hair follicle that produces tightly curled hair is typically

The papilla supplies nourishment to the

Cilia is the technical term for:

Gray hair is caused by:

Melanin is found mainly in which part of the hair?

Bundles called melanosomes are formed by:

Hair grows from a tube-like "pocket" called a root sheath or a(n):

Catagen, a brief transitional stage of hair growth, lasts for what amount of time?

Which hair color is at the greatest risk for sun damage and can turn yellow from too much exposure?

Three factors that affect the behavior of hair are heredity, products or appliances and:

How long does the telogen, or resting stage of hair growth, last?

The technical term for the study of hair is called:

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

Which of the following terms is another name for cell division?