332A Hair Science and Structure 2

Question 1

What is the outermost layer of the hair shaft called?

Accepted Answer

Cuticle

Answer

Cortex

Answer

Medulla

Answer

Matrix

Question 2

Which bond in the hair is the strongest and can only be broken by chemical treatments?

Accepted Answer

Disulfide bond

Answer

Hydrogen bond

Answer

Salt bond

Answer

Van der Waals bond

Question 3

What does the pH scale measure?

Accepted Answer

Acidity or alkalinity of a solution

Answer

Temperature of a solution

Answer

Viscosity of a product

Answer

Concentration of keratin

Question 4

What is the approximate natural pH of healthy hair and skin?

Accepted Answer

4.5 to 5.5

Answer

7.0

Answer

2.0 to 3.0

Answer

8.0 to 9.0

Question 5

The telogen phase of the hair growth cycle is best described as what?

Accepted Answer

The resting and shedding phase

Answer

The active growth phase

Answer

The transition phase

Answer

The regeneration phase

Question 6

What structure at the base of the hair follicle provides nourishment for hair growth?

Accepted Answer

Dermal papilla

Answer

Sebaceous gland

Answer

Arrector pili muscle

Answer

Hair bulge