Ch.7 Hair & Scalp Properties

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

What are the three growth cycles of human hair?

• anagen, growth phase, and telogen

• catagen, return, and transition

• anagen, catagen, and telogen

• anagen, transition, and mature

Which of the following is true about hair?

• . Cutting hair makes it grow back faster and darker.

• Hair growth rate is determined by genetics.

• Scalp massages will increase hair growth.

• Gray hair is coarser than pigmented hair.

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

• • nitrogen phase

• telogen phase

• anagen phase

• catagen phase

Which of the following can be a cause of dry hair and dry scalp?

• • overactive sebaceous glands

• inactive sebaceous glands

• • hair follicles growing out of the head at a perpendicular angle

• absence of melanin

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.

Hair is approximately _____ percent protein.

• 30

• 50

• 70

• 90

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

• the hair cuticle

• the hair fiber

• the medulla

• the cortex

Which component of hair is defined as the thickness or diameter of an individual hair strand?

• • porosity

• elasticity

• texture

• density

Each of the following is one of the main types of body hair EXCEPT ______.

• terminal hair

• lanugo hair

• vellus hair

• anagen hair