Hair and Scalp Properties

Front

Which of the following reason cosmetologists should understand hair and scalp properties? Identifying the shape of hair follicles can help when recommending methods to make client's hair grow faster, Identifying the cause of a dry or oily scalp helps to better recommend medication to the client to alleviate the condition, Identifying hair growth cycles and the differences between common and uncommon hair loss will help when recommending hair loss treatments to the client, Identifying the elasticity of hair helps to better determine treatments to soften coarse gray hairs to match the texture of the client's pigmented hair.

Back

Identifying hair growth cycles and the differences between common and uncommon hair loss will help when recommending hair loss treatments to the client.

Front

All of the following are living portions of hair that are below the skin surface EXCEPT ____________

Back

the arrector pili muscle

Front

Each of the following is a layer of the hair shaft structure EXCEPT ___________

Back

the hair fiber

Front

Which portion of the hair root structure supplies nutrients so that the hair can grow? Options: the hair bulb, the dermal papilla, the arrector pili, the hair follicle

Back

the dermal papilla

Front

Which sentence best describes the medulla?

Back

The medulla is the hair's pith or core.

Front

Which layer of the hair shaft provides strength, elasticity, and color?

Back

the cortex

Front

What are the major chemical elements that make up human hair?

Back

carbon, oxygen, hydrogen, nitrogen, and sulfur

Front

Which of the following best describes how the disulfide bond in human hair is formed? Oppositely charged atoms in the hair are attracted to one another to form weak physical cross-link side bonds, Amino acids are chemically bonded to each, end to end, to from a polypeptide chain, Oppositely charged atoms are attracted to each other form cross-linked side bonds between adjacent polypeptide chains, Sulfur atoms on neighboring cysteine amino acids within polypeptide chains in the hair join

Back

Sulfur atoms on neighboring cysteine amino acids within polypeptide chains in the hair join

Front

Which of the following is a situation in which a cosmetologist would allow the hair to cool before styling?
When salt side bonds are being formed by changes in pH during chemical servicing,
When hydrogen side bonds have been broken by the heat from a curling iron,
When peptide bonds between amino acids are broken by a heat lamp during color processing,
When disulfide bonds are converted to lanthionine bonds during servicing with a flat iron

Back

When hydrogen side bonds have been broken by the heat from a curling iron

Front

What is the outmost layer of hair?

Back

hair cuticle