Quiz 3

Question 1

Follicle

Answer 1

structure from which hair originates and grows
- Oil glands interject fats to hair (shininess and glow)
- Muscles can pull on follicle
- Pain nerves (pulling on your hair)

Question 2

Keratin

Answer 2

proteins that come out of the hair follicle
- Hair cells add and push up hair for growth, go in but never come out
- Once the hair comes out as a shaft, it is dead (no pain when cutting)
- What your blood is exposed to, comes out in your hair
- Hair grows ½ inch per month

Question 3

Hair History

Answer 3

Hair is a profile or history of what you’ve been exposed to for a short period of time
Depends on how often you cut your hair

Question 4

Stages of Hair Growth: Anagen

Answer 4

Growth phases, most active growing period
~ 85% of head hair in anagen phase
6-7 years

Question 5

Stages of Hair Growth: Catagen

Answer 5

transition phase between growth and rest
~1-2% of hair in catagen phase
~ 3 weeks

Question 6

Stages of Hair Growth: Telogen

Answer 6

shedding phase for hair
Hair stops growing
~ 3 months
~ 10-14% of hair in telogen phase

Question 7

Hair Color: Melanocytes

Answer 7

Granules of pigment

Question 8

Melanin

Answer 8

dark/brown/black - eumelanin
lighter/blonde - phaeomelanin
- Under genetic influences, these two types of melanin are present in various combinations, densities, and distributions

Question 9

Hair Treatment and Damage: Cut

Answer 9

Razor cut → angled tips
Scissors → straight tips

Question 10

Hair Treatment and Damage: Dyed/color

Answer 10

Hair cells are incorporated at the center of the strand
Dyed color is painted on the hair

Question 11

Hair Treatment and Damage: Perm

Answer 11

Chemicals denature and train your hair to curl

Question 12

Human Hair

Answer 12

interrupted, fragment, absent

Question 13

Hair

Answer 13

a fibrous outgrowth from the skin of mammals and consist of three anatomical regions: the cuticle, medulla, cortex