Define The Properties Of The Hair And Scalp Quiz

1. What does Pheomelanin provide in terms of natural hair color?

Red to blonde color

From the text:

Pheomelanin (fee-oh-MEL-uh-nin) provides natural hair colors from red and ginger to yellow/blonde tones.

Blue to green color

Brown to black color

Purple to pink color

Pheomelanin provides natural hair colors from red and ginger to yellow/blonde tones.

Explanation

Pheomelanin provides natural hair colors from red and ginger to yellow/blonde tones.

2. Pityriasis capitis simplex is marked by:

Redness on the scalp

Dry dandruff

From the text:

Pityriasis capitis simplex (KAP-ih-tis SIM-pleks) is the technical term for scalp inflammation marked by dry dandruff, thin scales, and an itchy scalp. The scales are usually attached to the scalp in masses or scattered loosely in the hair. Occasionally, the scales are so profuse that they fall to the shoulders. Dry dandruff is often the result of a sluggish scalp caused by poor circulation, lack of nerve stimulation, improper diet, emotional and glandular disturbances, and poor personal hygiene. Treatments include the use of mild or medicated shampoos, scalp treatments, regular scalp massage, daily use of antiseptic scalp lotions, and medicated scalp ointments.

Excess hair growth

Oily dandruff

Pityriasis capitis simplex is specifically characterized by dry dandruff, rather than oily dandruff, redness on the scalp, or excess hair growth.

Explanation

Pityriasis capitis simplex is specifically characterized by dry dandruff, rather than oily dandruff, redness on the scalp, or excess hair growth.

3. What do side bonds account for in the hair?

Color

Length

Thickness

Elasticity

From the text:

The cortex, middle layer of the hair, is made up of millions of polypeptide chains. These polypeptide chains are cross-linked together, like a ladder, by three different types of side bonds: hydrogen bonds, salt bonds, and disulfide bonds. These side bonds hold the hair fibers in place and account for the incredible strength and elasticity of human hair. These side bonds are essential to wet sets, thermal styling, permanent waving, and chemical hair relaxing (see Chapter 15).

Side bonds in the hair account for its elasticity, not color, thickness, or length.

Explanation

Side bonds in the hair account for its elasticity, not color, thickness, or length.

4. What is the condition characterized by alternating bands of gray and pigmented hair along the hair strand?

Striped hair

Patchy hair

Streaked hair

Ringed hair

From the text:

Ringed hair is a variety of canities, characterized by alternating bands of gray and pigmented hair throughout the length of the hair strand.

Ringed hair is a variety of canities that exhibits alternating bands of gray and pigmented hair along the length of the hair strand.

Explanation

Ringed hair is a variety of canities that exhibits alternating bands of gray and pigmented hair along the length of the hair strand.

5. Swelling the hair and raising the cuticle layer allows:

Liquids to penetrate

From the text:

A lengthwise section of hair shows that although the cuticle scales overlap, each individual cuticle scale is attached to the cortex. These overlapping scales makes up the cuticle layer. When viewed in cross-section, the scales can be seen to overlap, but it is important to note that hair has only one cuticle layer. Swelling the hair raises the cuticle layer and opens the space between the scales, which allows liquids to penetrate. If there were more than one cuticle layer and they were stacked on top of each other, nothing would be able to penetrate the hair.

Hair to grow faster

Hair to change color

Hair to become shiny

Swelling the hair and raising the cuticle layer allows liquids to penetrate because it opens up the space between the cuticle scales, making it easier for substances like hair treatments or dyes to enter the hair shaft.

Explanation

Swelling the hair and raising the cuticle layer allows liquids to penetrate because it opens up the space between the cuticle scales, making it easier for substances like hair treatments or dyes to enter the hair shaft.

6. Finasteride is a prescription drug that is taken:

Nasally

Injected

Orally

From the text:

Finasteride is an oral prescription medication for men only. Although finasteride is more effective and convenient than minoxidil, possible side effects include weight gain and loss of sexual function. Women may not use this treatment, and pregnant women or those who might become pregnant are cautioned not to even touch the drug because of the strong potential for birth defects.

Topically

Finasteride is taken orally as a prescription medication for men only, not topically, injected, or nasally.

Explanation

Finasteride is taken orally as a prescription medication for men only, not topically, injected, or nasally.

7. What is the main role of the blood and nerve supply found in the dermal papilla?

Nutrients

From the text:

The dermal papilla (puh-PIL-uh) is 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.

Controlling hair color

Regulating hormone levels

Supporting hair follicle structure

The blood and nerve supply found in the dermal papilla are responsible for providing the necessary nutrients for hair growth, not for regulating hormone levels, controlling hair color, or supporting hair follicle structure.

Explanation

The blood and nerve supply found in the dermal papilla are responsible for providing the necessary nutrients for hair growth, not for regulating hormone levels, controlling hair color, or supporting hair follicle structure.

8. Almost 40 percent of both men and women show some degree of hair loss by age:

45

50

30

35

From the text:

Androgenic alopecia (an-druh-JEN-ik) or androgenetic alopecia (an-druh-je-NET-ik) is the result of genetics, age, and hormonal changes that cause miniaturization of terminal hair, converting it to vellus hair. Androgenic alopecia can begin as early as the teens and is frequently seen by the age of 40. By age 35, almost 40 percent of both men and women show some degree of hair loss.

By age 35, almost 40 percent of both men and women show some degree of hair loss according to the text.

Explanation

By age 35, almost 40 percent of both men and women show some degree of hair loss according to the text.