chapter 11

Question 1

cuticle

Answer 1

the scale structure covering the exterior of the hair

Question 2

cortex

Answer 2

the main body of the hair shaft

Question 3

medulla

Answer 3

a cellular column running through the center of the hair

Question 4

anagen phase

Answer 4

the initial growth phase during which the hair follicle actively produces hair

Question 5

catagen phase

Answer 5

a transition stage between the anagen and telogen phases of hair growth

Question 6

telogen phase

Answer 6

the final growth phase in which hair naturally falls out of the skin

Question 7

follicular tag

Answer 7

a translucent piece of tissue surrounding the hairs shaft near the root, containing the richest source of DNA associated with hair

Question 8

nuclear DNA

Answer 8

DNA present within the nucleus of a cell, inherited from both parents

Question 9

mitochondrial DNA

Answer 9

DNA present in small structures, outside the nucleus of a cell, inherited maternally

Question 10

natural fibers

Answer 10

fibers derived entirely from animal or plant sources

Question 11

manufactured fibers

Answer 11

fibers derived from either natural or synthetic polymers

Question 12

regenerated fibers

Answer 12

fibers manufactured from natural raw materials

Question 13

synthetic fibers

Answer 13

produced solely from synthetic materials