Hair and Scalp Properties Test

What are the two parts of a strand of human hair?

• the follicle and the bulb

• the cuticle and the cortex

• the dermal papilla and the arrector pili

• the root and the shaft

Which part of the living portion of the hair is defined as the structure in the skin or scalp that surrounds the hair root and anchors the hair in the skin?

• the hair follicle

• the dermal papilla

• the arrector pili muscle

• the hair bulb

Which portion of the hair root structure supplies nutrients so that the hair can grow?

• the hair follicle

• the dermal papilla

• the arrector pili

• the hair bulb

Which sentence best describes the medulla?

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

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

• The medulla is the hair’s outermost layer.

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

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

• the cortex

• the hair fiber

• the medulla

• the hair cuticle

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

• proteins, water, lipids, and traces of minerals

• amino acids and polypeptide chains

• carbon, oxygen, hydrogen, nitrogen, and sulfur

• hydrogen bonds, side bonds, and salt bonds

Which of the following is a situation in which a cosmetologist would allow the hair to cool before styling?

• when peptide bonds between amino acids are broken by a heat lamp during color processing

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

• when salt side bonds are being formed by changes in pH during chemical servicing

• when disulfide bonds are converted to lanthionine bonds during servicing with a flat iron

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?

• texture

• elasticity

• porosity

• density

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

• density

• texture

• elasticity

• porosity

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

• overactive sebaceous glands

• absence of melanin

• inactive sebaceous glands

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