chapter 11
the hair root, and hair shaft
a mature strand of human hair is divided into two principle parts known as the
an ionic
a side bond that is easily broken by strong alkaline or acidic solutions is a called --------- bond
Arrector Pilli
a small involuntary muscle attached to the underside of a hair follicles is the
dermal papilla
a small, cone-shaped elevation located at the bottom of the hair follicle is the
bulb
a thickened, club shaped structure that forms the lower part of the hair root is called the
hair follicle
a tube like depression, or pocket in the skin or scalp that encases the hair root is called
cuticle cortex and medulla
hair is composed of cells arranged in three layers which are
thickness or diameter
hair texture refers to the ------------ of the hair
whorl
hair that forms a circular pattern is called a
51%
normal hair contains ---------- percent of the element carbon
17%
normal hair contains ----------- percent of the element nitrogen
6%
normal hair contains -------------- percent of the element hydrogen
21%
normal hair contains --------------- percent of the element oxygen
sebaceous glands
oil glands of the skin, connected to the hair follicles, are known as
Porosity
the ability of the hair to absorb moisture is called
Porosity
the ability of the hair to stretch and return to its original form without breaking is called
11
the body can produce ----------- of the 20 amino acids that make up hair and your diet must include the remaining essential amino acid
peptide bond
the chemical bond that joins amino acid to each other is called a
Melanin
the cortex contains coloring matter in the form of minute grains of -------- or pigment
texture
the thickness or diameter of the individual hair strand is called
...
----------- is the tiny grains of pigment in the cortex that give natural color to the hair
...
------------- is a topical medication that is applied to the scalp twice daily and has been proven to stimulate hair growth
...
---------------- is an oral prescription medication for hair loss that is available to men only
Protein
as newly formed cells mature, they fill up with a fibrous ----------- then move upwards, lose their nucleus, and die. this process is called keratinization.
ANAGEN (GROWING), CATAGEN (TRANSITIONAL), TELOGEN (RESTING)
all hair follicles have the same structure and cycle through the same three phases, which are
Furuncle, Boils appear in the dermis and epidermis and are caused by:
an acute staphylococci infection of a hair follicle that produces constant pain is
Terminal hair
long, coarse, pigmented hair found on the scalp, legs, arms, and body is known as
red and ginger
pheomelanin provides natural hair colors from ----------- to yellow and blond tones.
Vellus Hair
short, fine, downy, unpigmented hair is known as -------------- hair
pediculosis capitis
the infestation of the hair and scalp with head lice is known as
alopecia areata
the loss of hair in round or irregular patches without inflammation is called
Density
the number of individual hair strands on one square inch of the scalp indicates -----------
wave pattern
the shape of the hair strand described as straight, wavy, curly, or extremely curly, is known as ------------
trichology
the study of hair is known as
trichorrhexis nodosa
the technical term for hair that is in a dry, brittle condition including formation of nodular swellings along the hair shaft is
trichoptilosis
the technical term for split ends is
ringed hair
the technical term for the gray hair is
monilethrix
the technical term tor beaded hair is
A fungal infection of the scalp characterized by red papules, or spots at the opening of the hair filicles
tinea capitis
42. The infestation of the hair and scalp with head lice is called:, Head lice
tinea favosa