Flashcards
Flashcards
Cards in this deck (25)
- 1Dermal Papillasmall, cone-shaped elevations at the base of the
hair follicles. - 2Trichologythe study of hair.
- 3Hair Cuticlethe outermost layer of the
hair - 4Cortexthe middle layer of the hair
- 5Medullathe innermost layer of the hair and is
composed of round cells. - 6Pityriasisthe technical term for dandruff, which is
characterized by the excessive production and accumulation of skin cells - 7Malasseziaa naturally occurring
fungus that is present on all human skin but causes the symptoms of
dandruff when it grows out of control - 8Tineathe technical term for ringworm
- 9Pediculosis capitisis the
infestation of the hair and scalp with head lice - 10Furuncleis the technical term for a boil, an acute,
localized bacterial infection of the hair follicle that produces constant
pain - 11Carbuncleis an inflammation of the
subcutaneous tissue caused by staphylococci - 12HelixThe spiral shape of a coiled protein
- 13keratinizationProcess by which newly formed cells in the hair bulb mature, fill with keratin,
move upward, lose their nucleus, and die - 14Hydrogen BondsA weak, physical, cross-link side bond that is easily broken by water or heat.
- 15Disulfide BondsStrong 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 - 16Lanthionine BondsThe bonds created when disulfide bonds are broken by hydroxide chemical
hair relaxers after the relaxer is rinsed from the hair. - 17MelaninThe tiny grains of pigment in the cortex that give natural color to the hair.
- 18Vellus Hairshort, fine, unpigmented, and downy hair that
appears on the body, with the exception of the palms of the hands and the
soles of the feet. - 19Terminal HairLong, coarse, pigmented hair found on the scalp, legs, arms, and bodies of
males and females. - 20Anagenphase during which new hair is produced.
- 21CatagenThe brief transition period between the growth and resting phases of a hair
follicle. It signals the end of the growth phase. - 22Telogenthe final phase in the hair cycle that lasts until
the fully grown hair is shed. - 23TrichoptilosisTechnical term for split ends.
- 24CanitiesTechnical term for gray hair; results from the loss of the hair’s natural
melanin pigment. - 25Hypertrichosiscondition of abnormal growth
of hair, characterized by the growth of terminal hair in areas of the body that
normally grow only vellus hair.