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Hair Root
Hair Shaft
Chemical Composition
Hair Growth
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100

The study of hair is known as?

What is trichology

100

Oil glands of the skin, connected to the hair follicles, are known as _________.

What is the sebaceous gland
100

The chemical bond that join amino acids to each other is called a ________.

What is peptide bond

100

Short, fine, downy unpigmented hair is know as _______ hair.

What is Vellus

100
During which phase does the follicle canal shrink and detach from the dermal papilla?
What is Catagen
200

The two parts of a mature strand of human hair are the ______ and __________.

What is hair root and hair shaft

200

Of the 20 amino acids that make up hair , a person must obtain __________ of the essential amino acids from daily diet.

What is nine.

200

In the cortex, a side bond that is easily broken by strong alkaline or acidic solutions is called a _______bond.

What is the salt bond 

200

Long, coarse, pigmented hair found on the scalp, legs, arms, and body is known as_________.

What is terminal

200
The average growth of healthy scalp hair is ...............
What is 1/2 inch per month
300
The tube-like depression or pocket in the skin or scalp that contains the hair root is the .......... ............
What is hair follicle
300
The three main layers of the hair shaft are the _________.

What is the Cuticle, cortex ,and medulla

300
Which type of melanin provides natural colors ranging from red and ginger to yellow and blond tones?
What is Pheomelanin
300

All hair follicles have the same structure and cycle through the same three phases, which are_____, _____, and ______.

What is anagen, catagen, and telogen.
300

Hair follicles are not found on the?

What is the palms of the hands and soles of the feet

400

The ___________is the small, involuntary muscle in the base of the hair follicle.

What is arrector pili muscle

400
The fatty or oily substance secreted by the sebaceous glands is .........................
What is sebum
400
For chemicals to penetrate a healthy cuticle hair layer, they must have .........................
What is an alkaline pH
400
During the ...................... phase, new hair is produced because new cells are actively manufactured in the hair follicle.
What is anagen
400

As newly formed cells mature, they fill up with a fibrous protein, then move upward, lose their nucleus, and die. This process is called ________.

What is keratinization

500

The small cone- shaped elevation located at the bottom of the hair follicle?

What is the dermal papilla
500

What is the substance in the cortex that gives natural color to hair?

What is melanin

500

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

What is nitrogen and sulfur

500

he shape of a hair strand, described as straight, wavy, curly, or extremely curly is known as it's __________.

What is wave pattern

500

This bond is broken by water and heat.

What is hydrogen.