Hair and Scalp Properties

31問 • 2年前

問題一覧

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

the root and the shaft

Which partof the living portion of the hait is defined as the structure in the skin or scalp that surounds the hair root and anchors the hair in the skin?

the hair follicle

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.

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

hydrogen, salt, and disulfide

Which of the following is true about hair?

Hair growth rate is determined by genetics.

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.

What are the three growth cycles of human hair?

anagen, catagen, and telogen

Which sentence best describes the medulla?

The medulla is the hair's pith or core.

The ability of the hair to absorb moisture is hair _______.

porosity

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

catagen phase

What are the major chemical elements that make up human hair?

carbon, oxygen, hydrogen, nitrogen, and sulfur

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

the cortex

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.

Hair is approximately _____ percent protein.

The measuremont that describes the number of individhat hair stands on l square inch of the scalp is hair _______.

density

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

when hydrogen side bonds have been broken by the heat from a curling iron

Each of the folloving is one ofthe main ypes of body hair EXCEPT ________.

anagen hair

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

coarse hair

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

anagen

Each ofthe following is a layer of the hair shaft structure EXCEPT ________.

the hair fiber

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

the dermal papilla

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.

What is the outermost layer of hair?

hair cuticle

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

the arrector pili muscle

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

The hair, skin, nails, and glands are part of the _____system.

epidermal

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

telogen phase

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

inactive sebaceous glands

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

texture

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

polypeptide

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.

Chemistry and chemical

Gia Taylor · 50問 · 2年前

Chemistry and chemical