Cosmetology Quiz

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

• the cuticle and the cortex

• the root and the shaft

• the follicle and the bulb

• the dermal papilla and the arrector pili

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 hair bulb

• the arrector pili muscle

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

• the hair follicle

• the hair bulb

• the dermal papilla

• the arrector pili

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

• the medulla

• the cortex

• the hair fiber

• the hair cuticle

Which sentence best describes the medulla?

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

• 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.

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

• the cortex

• the hair cuticle

• the hair fiber

• the medulla

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

• hydrogen bonds, side bonds, and salt bonds

• carbon, oxygen, hydrogen, nitrogen, and sulfur

• proteins, water, lipids, and traces of minerals

• amino acids and polypeptide chains

Which of the following best describes how a disulfide bond in human hair is formed?

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

• 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 other, end to end, to form a polypeptide chain.

• Oppositely charged atoms are attracted to each other to form cross-linked side bonds between adjacent polypeptide chains.

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

• porosity

• elasticity

• density

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

• density

• porosity

• elasticity

• texture