ch 07: Hair and Scalp Properties

Which is a primary reason cosmetologists need to understand the properties of the hair and scalp

Cosmetologists are responsible for protecting their clients’ hair and scalp

The study of hair is called ___.

trichology

The part of the hair that is located above the epidermis is the ____.

shaft

what does the dermal papilla do?

It supplies the nutrients that hair needs to grow

What is the function of the hair bulb?

it contains cells that form the hair strand

Which of the following is true about the hair shaft?

It is the nonliving portion of the hair

Which hair type is most likely to have a medulla?

coarse hair

Which parts of the hair shaft plays an important role during chemical services?

hair cuticle

Hair is approximately 90 percent ___.

protein

If you can see the scalp, the hair is thin.

density

Which of the following is true about hair porosity?

High porosity is often caused by overprocessing.

A client’s hair is brittle and breaks easily. What can you do when providing a service to protect the hair?

Use a lower-pH solution to minimize further damage to the hair.

Which type of bond is an end bond?

peptide

A client’s hair is extremely curly. What is likely to be the shape of the cross-section of the hair follicles?

elliptical

Which of the following is characteristic of a hair whorl?

Hair grows in a circular pattern.

Which type of hair is often referred to as peach fuzz?

vellus

Which is true about the telogen phase?

Hair can shed during the telogen phase.

Your 52 year old client is letting the hair grow out. Growth hasn't occurred in 6 months. What should you advise this client?

The hair will grow; it just may take longer because the client is older than 50.

Which of the following is a fact about hair growth?

Hair growth rate is based on genetics.

The tube-like depression or pocket in the skin or scalp that contains the hair root is the .

hair follicle

The middle layer of the hair is the .

cortex

The is the outermost layer of the hair.

hair cuticle

The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and .

sulfur

The strong, chemical bonds that join amino acids are called .

peptide bonds

Hair texture is classified as .

coarse, medium, or fine

Shaving, clipping, and cutting the hair on the head .

has no effect on hair growth