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Flashcards in Hair Test 3&4 Deck (78)
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A small cone-shaped piece of the dermis bulges up into the bottom of the hair follicle forming the what

Hair papilla

1

A club shaped structure at the bottom of the hair follicle that completely surrounds the papilla is the what

Hair bulb

2

Oxygen, amino acids and nutrients needed for the production of hair reach the stem cells through the what

Papillary capillaries

3

The epidermis grows downward into the dermal tissue creating a pocket called the what

Hair follicle

4

Which saccular gland is attached to the side of the hair follicle

Sebaceous

5

The madulla layer of the hair has what..

Has no known function

6

The outermost layer of the hair is the

Cuticle

7

The layer of the hair that acts as an outside barrier is the what

Cuticle

8

The layer of the hair where most melanin is found

Cortex

9

Which type of hair does not always have three layers

Fine

10

What percentage of the weight of the hair does the cortex make up

75-90%

11

The portion of the hair above the skins surface

Hair shaft

12

Whenever a product with an alkaline pH is used it will increase the hairs what

Porosity

13

What layer of the hair is translucent and contains no melanin

Cuticle

14

What are the building blocks of all proteins

Amino acids

15

'What' is the chemical cross bond found in the hair

Cystine bond

16

'What' is the chemical bond that must be broken and reformed when doing a permanent wave or hair relaxer.

Cystine bond

17

What is the growth cycle of hair

Anagen

18

The average growth cycle of hair usually last

5-7 yrs

19

What is the short, very fine hair found on the body

Vellus

20

Shaving will cause the hair to grow at a faster rate.. T or F

False

21

Which type of hair would look the flattest when looking at a cross sectional view of it

Very curly

22

What is the average moisture content of dry hair

5-10%

23

Which type of melanin produces the black to brown shades

Eumelanin

24

Which color of the hair has the larger color molecules

Black

25

What refers to how many hairs grow in a square inch

Density

26

Which shade of hair has the lowest density.

Red

27

Which shade of hair usually has the highest density

Blonde

28

Healthy wet hair can be stretched up to what percent without damage

50%

29

The average head has approximately how many shafts of hair

100,000