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100

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

What is Polypeptide?

100

All natural color is the result of pigment called.

What is melanin

100

The fibrous protein core formed by elongated cells that contain melanin pigment is the            .

What is cortex

100

What are the three growth cycles of human hair?

What is Anagen, Catagen and telogen?

100

The small involuntary muscle fiber in the base of the hair follicle is the                 .

 What is arrector pili

200

A lengthwise section of hair that shows that cuticle scales overlap and each individual cuticle scale is attached to the             .

What is cortex

200

Hair is approximately              percent protein.

What is 90

200

The hair shaft that emerges from the scalp is a nonliving fiber composed of             .

What is keratinized protein?

200

Vellus hair is also known as                hair.

What is lanugo

200

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

What is follicle?

300

A physical side bond that is easily broken by water and heat is a                   .

What is Hydrogen bond?

300

Hair is composed of protein that grows from cells originating within the           .

What is hair follicle?

300

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

What is integumentary?

300

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

 What is hydrogen, salt, and disulfide

300

The major elements that make up human hair are carbon, oxygen, hydrogen, nitrogen, and sulfur, often referred to as                     .

What is COHNS elements

400

A small cone-shaped area located at the base of the hair follicle that fits into the hair bulb is the.

What is dermal Papilla

400

The Greek word trichos  means          .

What is hair

400

What is the outermost layer of hair?

What is hair cuticle?

400

The thickened, club-like structure that forms the lower part of the hair root is the             .

What is hair bulb

400

What type of bond is broken by wetting the hair with water and is reformed when the hair dries?

 What is hydrogen bond?

500

A weak, physical, cross-link side bond between adjacent polypeptide chains that is broken by changes in pH is a                bond.

What is salt bond?

500

The body naturally produces                of the 20 amino acids that make up hair.

What is 11?

500

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

What is anagen

500

The substance secreted by the sebaceous glands is called               .

What is sebum?

500

What part of the hair is located below the surface of the epidermis?

What is the hair root?

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