Hair Root
Which portion of the hair root structure supplies nutrients so that the hair can grow?
The dermal papilla
The hair, skin, nails, and glands are part of the _____ system.
Integumentary
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 type of hair has the largest diameter and usually requires more processing?
Coarse hair
What are the three growth cycles of human hair?
Anagen, catagen, and telogen
What is the outermost layer of hair?
Hair cuticle
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 client's hair growth is shorter than the anagen phase in other people's hair growth, so the client's hair will not grow any longer.
All of the following are living portions of hair that are below the skin surface EXCEPT __________.
The arrector pili muscle
The three different types of side bonds that link chains of amino acids together are _____.
Hydrogen, salt, and disulfide
What are the major chemical elements that make up human hair?
Carbon, oxygen, hydrogen, nitrogen, and sulfur
Each of the following is one of the main types of body hair EXCEPT ______.
Anagen hair
The ability of the hair to absorb moisture is hair _____.
Porosity
What is the phase of the hair growth cycle in which the hair can shed?
Telogen phase
Which component of hair is defined as the thickness or diameter of an individual hair strand?
Texture
What is the growth phase during which new hair is produced?
Anagen
If a cosmetologist holds a strand of hair with one hand while sliding the other hand's thumb and forefinger from the end of the strand to the client's scalp, what component of the hair is being analyzed?
Porosity
Which sentence best describes the medulla?
The medulla is the hair's pith or core.
In which phase of the hair growth cycle does the follicle canal shrink and detach from the dermal papilla?
Catagen phase
Each of the following is a layer of the hair shaft structure EXCEPT ______.
The hair fiber
What are the two parts of a strand of human hair?
The root and the shaft
Which of the following is true about hair?
Hair growth rate is determined by genetics.
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.
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's texture.
Which statement best describes what may have happened to cause a client's hair to grow in a whorl pattern?
The strands of hair in the whorl are leaving the follicles at an angle different from the surrounding hairs.
The measurement that describes the number of individual hair strands on 1 square inch of the scalp is hair _____.
Density