Ch 07 Hair and Scalp Properties

Question 1

What body system are the hair, skin, nails, and glands part of?

Answer 1

integumentary system

Question 2

Define Tricology

Answer 2

the study of hair, including its diseases and care

Question 3

What are the two main parts of human hair?

Answer 3

the root and the shaft

Question 4

Where is the hair root located?

Answer 4

below the epidermis (dermis)

Question 5

Where is the hair shaft located?

Answer 5

above the epidermis

Question 6

Contraction of this structure causes the hair to stand up, resulting in “goose bumps”

Answer 6

arrector pili muscle

Question 7

What main hair structure is found at the base of the hair follicle?

Answer 7

Bulb

Question 8

A tube-like structure that surrounds the hair root and anchors the hair in the skin or scalp

Answer 8

hair follicle

Question 9

contains blood vessels that supply nutrients that allow the hair to grow

Answer 9

dermal papilla

Question 10

Produces a substance called sebum, also known as oil, which lubricates the hair and skin

Answer 10

Sebaceous gland

Question 11

Explain the process of keratinization

Answer 11

It involves the formation of keratin polypeptides

Question 12

List the 3 main layer of the hair shaft

Answer 12

cuticle,cortex, and the medulla

Question 13

The outermost layer of the hair is:

Answer 13

hair cuticle

Question 14

Describe the cuticle layer

Question 15

Which layer of the hair is the cortex?

Answer 15

the fibrous protein layer

Question 16

Which layer of the hair is also known as the pith or core?

Answer 16

medulla

Question 17

What hair layer is responsible for the hair’s strength?

Answer 17

cortex

Question 18

What layer of the hair changes involving oxidation of hair color, wet setting, thermal styling, permanent waving, and chemical hair relaxing take place?

Answer 18

hair cuticle

Question 19

The innermost layer of the hair is composed of round cells.

Answer 19

medulla

Question 20

True or False: All Hair has three layers.

Answer 20

false

Question 21

What is the name of the fibrous protein that makes up 90 percent of hair?

Answer 21

keratin

Question 22

What is the composition of the remaining 10 percent of hair?

Answer 22

carbon (45%), oxygen (28%), nitrogen (15%), hydrogen (6.7%), and sulfur (5.3%).

Question 23

Where are the living cells that keratinize to form hair located?

Answer 23

hair bulb