Chapter 11 (first half) Worksheet

Abnormal Hair Loss
Autoimmune disorder that causese the affected hair follicles to be msitakenly attacked by a person's own immune system; usually begins with one or more small, round, smooth bald patches on the scalp.
Total loss of scalp hair
Complete loss of body hair
Units that are joined together end-to-end like pop beads by strong, chemical peptide bonds (end bonds) to form the polypeptide chains that comprise proteins
Also known as growth phase; phase during which new hair is produced.
hair loss characterized by miniaturization of terminal hair that is converted to vellus hair; in men, it is known as male pattern baldness
The small, involuntary muscle in the base of the hair follicle
Technician term for gray hair
Inflammation of the subcutaneous tissue casued by staphylococci; similar to a furuncle but larger
The brief transtion period between the growth and resting phases of a hair follicle. It signals the end of the growth phase.
The five elements-carbon, oxygen, hydrogen, nitrogen, and sulfur-that make up human hiar, skin, tissue, and nails.
Middle layer of the hair; fibrous protein core formed by elongated cells containing melanin pigment
Tuft of hair that stands straight up
An amino acid with a sulfur atom (S) that joins together two peptide strands
An amino acid formed when 2 cysteine amino acids (with single sulfur) are joined by their sulfur groups or disulfide bond.
Plural: dermal papillae. A small, cone-shaped elevation located at the base of the hair follicle that fits into the hair bulb.
Strong chemical side bond that joins the sulfur atoms of two neighboring cysteine amino acids to create one cystine, which joins together two polypeptide strands like rungs on a ladder
Provides natural dark brown to black color to the hair and is the dark pigment predominant in black and brunette hair
Technical term for brittle hair
Lowest part of o hair strand; the tickened, club-shaped structure that forms the lower part of the hair root
Outermost layer of hair; consisting of a single, overlapping layer of transparent, scale-like cells that look like shingles on a roof.
The number of individual hair strands on 1 square inch of scalp
Ability of the hair to stretch and return to its orgininal length without breaking
The tube-like depression or pocket in the skin or scalp that contains the hair root.
Ability of the hair to absorb moisture