Hair and Scalp Properties - Chapter 7 Study Guide

Which of the following is a reason cosmetologists should understand hair and scalp properties?

Identifying hair growth cycles and the differences between common and uncommon hair loss will help when recommending hair loss treatments to the client

All of the following are living portions of hair that are below the skin surface EXCEPT

The arrector pili muscle

What are the two parts of a strand of human hair?

The root and the shaft

Which part of the living portion of the hair is defined as the structure in the skin or scalp that surrounds the hair root and anchors the hair in the skin?

The hair follicle

Which portion of the hair root structure supplies nutrients so that the hair can grow?

The dermal papilla

Each of the following is a layer of the hair shaft structure EXCEPT

The hair fiber

Which sentence best describes the medulla?

The medulla is the hair's pith or core

Which layer of the hair shaft provides strength, elasticity, and color?

The cortex

Which of the following best describes how a disulfide bond in human hair is formed?

Sulfur atoms on neighboring cysteine amino acids within polypeptide chains in the hair join

Which of the following is a situation in which a cosmetologist would allow the hair to cool before styling?

When hydrogen side bonds have been broken by a heat lamp during color processing

If a cosmetologist holds a strand of hair with one hand while sliding the other hands thumb and forefinger from the end of the strand to the clients scalp, what component of the hair is being analyzed?

Porosity

Which component of hair is defined as the thickness or diameter of an individual hair strand?

Texture

Which of the following can be a cause of dry hair and dry scalp?

Inactive sebaceous glands

Which of the following best describes a procedure a cosmetologist could use to determine how quickly hair will process during chemical servicing?

Feel a strand of hair to determine the hair texture

Which statement best describes what may have happened to cause a clients hair to grow in a whorl pattern?

The strand of hair in the whorl are leaving the follicles at an angle different from the surrounding hairs

Each of the following is one of the main types of body hair EXCEPT

Anagen hair

What is the phase of the hair growth cycle in which the hair can shed?

Telogen phase

In which phase of the hair growth cycle does the follicle canal shrink and detach from the dermal papilla?

Catagen phase

Which of the following conclusions can a cosmetologist make if a client expresses concern about not being able to grow the hair beyond shoulder length?

The anagen phase of the clients hair growth is shorter than the anagen phase in other peoples hair growth, so the clients hair will not grow and longer

The hair, skin, nails, and glands are apart of the _______ system

Integumentary

What is the outermost layer of hair?

Hair cuticle

Hair is approximately ______ percent protein

90%

A long chain of amino acids linked by peptide bonds is called a _______ chain

Polypeptide

The three different types of side bonds that link chains of amino acids together are _______

Hydrogen, salt, and disulfide

Which type of hair has the largest diameter and usually requires more processing?

Coarse hair

The measurement that describes the number of individual hair strands on 1 square inch of the scalp is hair _______

Density

The ability of the hair to absorb moisture is hair _________

Porosity

What are the three growth cycles of human hair?

Anagen, catagen, and telogen

What is the growth phase during which new hair is produced?

Anagen

Which of the following is true about hair?

Hair growth rate is determined by genetics