ch 11 Flashcards
(19 cards)
Which of the following conditions is an autoimmune disorder?
alopecia areata
The final phase in the hair cycle, lasting until the fully grown hair is shed, is the ____ phase
telogen
Research has determined that dandruff is the result of a fungus called:
malassezia
Hydroxide chemical hair relaxers break disulfide bonds and convert them to:
lanthionine bonds
An acute, localized bacterial infection of a hair follicle that produces constant pain, is called a boil or a:
furuncle
The small, cone-shaped area at the base of the hair follicle that fits into the hair bulb is the:
dermal papilla
Generally, only which type of hair contains a medulla?
thick, coarse hair
The cortex of the hair has a fibrous protein core formed by ____ cells.
elongated
The ____ is the tube-like depression in the skin or scalp that contains the hair root.
hair follicle
Unique protein structures within the cortex are responsible for the color and ____ of hair.
elasticity
Hair that forms a circular growing pattern, as on the crown of the head, is called a:
whorl
A study suggests that bald men are perceived as:
older
How many hair growth treatments have been approved by the FDA for sale in the United States?
two
Extremely curly hair does NOT typically:
have a fairly regular and uniform diameter along a single strand
The medulla is composed of ____ cells.
round
The average hair density is about how many hairs per square inch?
2.200
Most of the total weight of hair comes from which layer of the hair?
cortex
The scientific study of hair and its diseases and care is called:
trichology
Which condition is characterized by dry, sulfur-yellow, cuplike crusts on the scalp?
tinea favosa
