Ch 7 Hair and Scalp Properties

Which of the following is the best reason cosmetologists should understand hair and scalp properties?

• Identifying hair growth cycles and differences between common and uncommon hair loss.

• Elasticity of hair helps better determine treatments.

• Be able to tell client if hair is dry or oily.

• To know the shape of follicles.

Which one is not a layer of the hair shaft ?

• the cortex

• hair fiber

• hair cuticle

• medulla

The medulla is the what?

• outermost layer

• cone-shaped elevation

• is the hair's pith or core

• the fibrous protein of the hair

The nutrients comes from where in the hair root?

• hair bulb

• arrector pili muscle

• hair follicle

• dermal papilla

What does COHNS stand for

• amino acids and polypeptide chains

• proteins, water, lipids, and traces of minerals

• hydrogen bonds, side bonds, and salt bonds

• carbon, oxygen, hydrogen, nitrogen and sulfur

How does disulfide bond in human hair is formed?

• hair are attracted to one another to form weak physical cross-links.

• Amino acids are chemically bonded to each other, end to end, to form a polypeptide chain

• Oppositely charged atoms are attracted to each other to form cross-linked side bonds

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

Which type of hair has the largest diameter and usually requires more processing? 

• gray hair

• terminal hair

• medium hair

• coarse hair

A long chain of amino acids linked by peptide bonds is called a chain. 

• polypeptide 

• amino-peptide 

• keratin

• polymer

In which phase of the hair growth cycle does the follicle canal shrink and detach from the dermal papilla? 

• nitrogen phase

• catagen phase

• anagen phase

• telogen phase

. Which of the following conclusions can a cosmetologist make if a client expresses concern about not being able to grow the hair beyond shoulder length? 

• The client has primarily lanugo hair, which is shed more frequently than vellus hair or terminal hair.

• The catagen phase of the client’s hair growth occurs more quickly than that phase in other people’s hair growth, so the client’s hair stops growing. 

• The client has a larger amount of vellus hair than terminal hair, so the client sheds most hair strands before they can grow long. 

• The anagen phase of the client’s hair growth is shorter than the anagen phase in other people’s hair growth, so the client’s hair will not grow any longer.