Cosmetology Test Hair & Scalp Properties 2

Question 1

What is the average growth rate of human hair per month?

Accepted Answer

1/2 inch

Answer

Human hair grows approximately 1/2 inch (about 1.25 cm) per month on average.

Question 2

Which layer of the hair shaft is responsible for giving hair its elasticity and strength?

Accepted Answer

Cortex

Answer

The cortex is the middle layer of the hair shaft and provides elasticity, strength, and contains melanin pigment.

Question 3

What term describes the ability of hair to absorb moisture from the atmosphere?

Accepted Answer

Hygroscopicity

Answer

Hygroscopicity is the hair's ability to absorb moisture from the surrounding atmosphere.

Question 4

The arrector pili muscle is responsible for which action?

Accepted Answer

Causing goosebumps by raising hair

Answer

The arrector pili is a small muscle attached to the hair follicle that contracts to cause the hair to stand upright, producing goosebumps.

Question 5

Which type of melanin gives hair red and blonde tones?

Accepted Answer

Pheomelanin

Answer

Pheomelanin is the pigment responsible for red and blonde hair colors.

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