Ch 7 & 8 Hair and Scalp Properties & Disorders

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

• the hair bulb

• the dermal papilla

• the arrector pili

• the hair follicle

Which sentence best describes the medulla?

• It is the hair's outermost layer.

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

• It is the hair's pith or core and not all hair types have it.

• It is the fibrous protein layer of the hair.

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

• proteins, water, lipids, and trace chemicals

• amino acids and polypeptide chains

• carbon, oxygen, hydrogen, nitrogen, and sulfur

• hydrogen bonds, side bonds, and salt bonds

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

• cortex

• cuticle

• medulla

• fiber

What is the outermost layer of the hair?

• follicle

• medulla

• cuticle

• cortex

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

• porosity

• elasticity

• texture

• density

The measurement that describes the number of individual hair strands on 1 square inch of the scalp is hair _____.

• porosity

• elasticity

• diameter

• density

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

What is the phase of the hair growth cycle in which the hair can shed?

• catagen phase

• nitrogen phase

• telogen phase

• anagen phase

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

• porosity

• elasticity

• density

• saturation