7

Question 1

Hair shaft

Answer 1

Part of the hair that projects above the epidermis

Question 2

Keratinization

Answer 2

Process by which newly formed cells in the hair bulb mature, full with keratin, move upward lose their nucleus and die

Question 3

Side bonds

Answer 3

Bonds that cross link polypeptide chains and are responsible for extreme strength and elasticity of human hair ; account for 1/3 off hairs overall strength.

Question 4

Cysteine

Answer 4

Amino acid with a sulfur atom that joins together two peptide strands

Question 5

Whorl

Answer 5

Occurs when hair leaves the follicles at an angle. Hair that grows in a circular pattern.

Question 6

COHNS ELEMENTS

Answer 6

Carbon
Oxygen
Hydrogen
Nitrogen
Sulfur

Question 7

Wave pattern

Answer 7

Amount of movement of the hair strand. Described as straight wavy curly coily

Question 8

Hair follicle

Answer 8

Tube like structure in the skin that surrounds the hair root and anchors the hair in skin

Question 9

Hair density

Answer 9

The number of individual Hair stands per square inch

Question 10

Amino acids

Answer 10

Form the building blocks of protein; link together and to end like pop beads by strong chemical peptide bonds to form the polypeptides chains that comprise proteins

Question 11

polypeptide chain

Answer 11

long chain of amino acids linked by peptide bonds

Question 12

cowick

Answer 12

hair that grows straight up or at a different angle than the other hair; usually more noticeable at the crown

Question 13

keratin

Answer 13

fibrous protein of cells that is also the principal component of skin, hair, and nails

Question 14

terminal hair

Answer 14

long, coarse, pigmented hair found on the scalp, legs, arms, and body

.

Question 15

hair root

Answer 15

part of the hair located below the surface of the epidermis

Question 16

arrector pili muscle

Answer 16

small involuntary muscle in the dermis that attaches to the hair follicle; contraction of the muscle causes hair to stand, causing goose-bumps

Question 17

peptide bond

Answer 17

also known as an end bond; chemical bond that joins amino acids to each other, end-to-end, to form a polypeptide chain

Question 18

hair stream

Answer 18

hair flowing in the same direction, resulting from follicles sloping in the same direction

Question 19

cortex

Answer 19

fibrous protein layer of the hair; responsible for the strength, elasticity, and color of hair

Question 20

salt bond

Answer 20

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

Question 21

hair texture

Answer 21

thickness or diameter of an individual hair strand