332A Hair Science and Structure 3

Question 1

How many layers does the hair shaft consist of?

Accepted Answer

Three

Answer

The hair shaft consists of three layers: the cuticle (outer), cortex (middle), and medulla (inner core, which may be absent in fine hair).

Question 2

What type of hair has no medulla?

Accepted Answer

Very fine or vellus hair

Answer

Very fine hair and vellus hair often lack a medulla entirely. The medulla is more commonly present in coarse or thick hair types.

Question 3

Which gland attached to the hair follicle produces sebum?

Accepted Answer

Sebaceous gland

Answer

The sebaceous gland is attached to the hair follicle and produces sebum, a natural oil that lubricates the hair and skin, keeping them moisturized.

Question 4

What is the catagen phase of the hair growth cycle?

Accepted Answer

The short transition phase between growth and rest

Answer

The catagen phase is a brief transitional phase lasting about 2 to 3 weeks, during which the hair follicle shrinks and detaches from the dermal papilla.

Question 5

What determines the natural colour of a person's hair?

Accepted Answer

The ratio and type of melanin in the cortex

Answer

Natural hair colour is determined by the type, amount, and distribution of melanin pigments (eumelanin and pheomelanin) within the cortex of the hair shaft.

Red Seal Hairstylist 332A Practice Test

Red Seal Hairstylist 332A Practice Test

332A Hair Science and Structure 3