332A Hair Science and Structure 5

Question 1

What percentage of scalp hair is typically in the anagen phase at any given time?

Accepted Answer

85-90%

Answer

50%

Answer

70%

Answer

100%

Question 2

What is the effect of acidic products on the hair cuticle?

Accepted Answer

They close and harden the cuticle

Answer

They open and lift the cuticle

Answer

They dissolve the cuticle

Answer

They have no effect on the cuticle

Question 3

What is vellus hair?

Accepted Answer

Short, fine, unpigmented body hair

Answer

Thick, pigmented terminal hair

Answer

Hair found only on the scalp

Answer

Hair in the telogen phase

Question 4

Salt bonds in hair are broken by changes in what?

Accepted Answer

pH

Answer

Temperature

Answer

Humidity

Answer

Light exposure

Question 5

What is hair density?

Accepted Answer

The number of individual hair strands per area of the scalp

Answer

The diameter of each hair strand

Answer

The amount of curl in the hair

Answer

The moisture content of the hair

Question 6

What is the main function of the hair cuticle?

Accepted Answer

To protect the inner cortex from damage

Answer

To provide colour to the hair

Answer

To supply nutrients to the hair

Answer

To produce new hair cells