Milady edition 14 chapter 7 Exam Questions And Correct Answers

Milady edition 14 chapter 7 Exam Questions And Correct Answers vellus hair - Answer -short, fine, unpigmented hair that appears on the body, often referred to as peach fuzz. It is typically less than one-third inch long (approximately one centimeter) and can appear anywhere on the skin apart from the palms, soles, and lips pheomelanin - Answer -yellow to red pigment found in natural blonde to red shades of hair keratin - Answer -fibrous protein of cells that is also the principal component of skin, hair, and nails trichology - Answer -scientific study of hair and its diseases and care dermal papilla - Answer -cone-shaped elevation found at the base of the bulb (plural: dermal papillae) anagen phase - Answer -also known as the growth phase; hair phase during which new hair is produced disulfide bond - Answer -strong chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids to create one cysteine, which joins together two polypeptide strands like rungs on a ladder cysteine - Answer -amino acid with a sulfur (S) atom that joins together two peptide strands polypeptide chain - Answer -long chain of amino acids linked by peptide bonds hair texture - Answer -thickness or diameter of an individual hair strand amino acids - Answer -form the building blocks of protein; link together end to end like pop beads by strong, chemical peptide bonds (end bonds) to form the polypeptide chains that comprise proteins hair shaft - Answer -part of the hair that projects above the epidermis hair density - Answer -measures the number of individual hair strands on 1 square inch (2.5 square centimeters) of scalp lanugo hair - Answer -short, fine hair that covers a fetus and generally sheds within a few weeks of birth lanthionine bonds - Answer -bonds created when disulfide bonds are broken by hydroxide chemical hair relaxers cortex - Answer -fibrous protein layer of the hair; responsible for the strength, elasticity, and color of hair eumelanin - Answer -Produces brown to black pigments in the hair arrector pili muscle - Answer -Causes hair to stand on end and goose bumps to appear hair bulb - Answer -found at base of the follicle; has a bulb shape and contains living cells that will form the hair strand medulla - Answer -innermost layer found in coarse hair and beard hair; known as hair's pith or core; absent in fine hair hair porosity - Answer -The ability of the hair to absorb moisture sebaceous glands - Answer -also known as oil glands; glands connected to hair follicles; secrete sebum hair follicle - Answer -tube-like structure in the skin or scalp that surrounds the hair root and anchors the hair in the skin hair stream - Answer -hair flowing in the same direction, resulting from follicles sloping in the same direction whorl - Answer -Hair that forms in a circular pattern on the crown of the head