6.2 – Hair and nails Flashcards
the hair, nails, and cutaneous glands are known as ___ organs of the skin
accessory (appendages)
an individual hair is also known as which of the following?
pilus
the deep end of the follicle forms a bulge that serves as a source of ___ cells for follicle growth
stem
which of the following are accessory organs (appendages) of skin?
hair, nails, and cutaneous glands
hair grows in diagonal tubes called hair ___
follicles
name the muscle that extends from dermal collagen fibers to the connective tissue root sheath of a hair follicle
arrector pili
what are the 2 principal layers of the hair follicle?
epithelial root sheath and connective tissue root sheath
fingernails and toenails are derivatives of which epidermal layer?
stratum corneum
the deep end of the follicle widens to form a bulge. What is its function?
source of stem cells for follicle growth
the hair, nails, and cutaneous glands are known as ___ organs of the skin
accessory
which type of sweat gland has a duct that opens by way of a pore on the skin surface?
eccrine/merocrine sweat gland
an individual hair is also known as which of the following?
pilus
which describes merocrine sweat glands?
simple tubular gland w/ a twisted coil in dermis or hypodermis
what causes “goose bumps”?
contraction of the piloerector muscles
fingernails and toenails are hard derivatives of the stratum ___ of the epidermis
corneum
true statements about apocrine sweat glands
they produce sweat that contains fatty acids
they occur in the groin, anal region, axilla, areola, and beard area
glands that secret a substance that combines w/ sebum to keep the eardrum protected and prevent foreign particles from entering the canal are called ___ glands
ceruminous
sweat glands that have a relatively narrow lumen and a duct that opens by way of a pore on the skin surface are called ___ sweat glands
eccrine/merocrine
mammary glands are modified versions of which type of gland?
apocrine
the type of sweat gland that is the most abundant gland in the body, numbering 3 to 4 million in the adult skin, is the ___ sweat gland
eccrine/merocrine
“goosebumps” are caused by contractions of which muscles?
piloerector
