ch 7 hair and scalp properties

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

• amino-peptide
• polymer
• keratin
• polypeptide

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

• the hair cuticle

• the hair fiber

• the medulla

• the cortex

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 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.

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

If a cosmetologist holds a strand of hair with one hand while sliding the other hand’s thumb and forefinger from the end of the strand to the client’s scalp, what component of the hair is being analyzed?

• porosity

• elasticity

• density

• texture

Which sentence best describes the medulla?

• The medulla is the hair’s outermost layer.

• The medulla is a cone-shaped elevation at the base of the hair bulb.

• The medulla is the hair’s pith or core.

• The medulla is the fibrous protein layer of the hair.

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

• carbon, oxygen, hydrogen, nitrogen, and sulfur

• proteins, water, lipids, and traces of minerals

• amino acids and polypeptide chains

• hydrogen bonds, side bonds, and salt bonds

The ability of the hair to absorb moisture is hair _________.

• porosity
• Elasticity

• Density

• Saturation

Which statement best describes what may have happened to cause a client’s hair to grow in a whorl pattern?

• The hair in the whorl has a raised cuticle, whereas the surrounding hair does not.

• The strands of hair in the whorl are oily due to overactive sebaceous glands.

• The strands of hair in the whorl are leaving the follicles at an angle different from the surrounding hairs.

• The strands of hair in the whorl are less elastic than the surrounding hair as a result of damage from a thermal styling tool.

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

• Identifying the shape of hair follicles can help when recommending methods to make a 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

What is the outermost layer of hair?

• hair follicle

• hair medulla

• hair cuticle

• hair cortex