Thin skin contains ________ layer(s) of keratinocytes, and thick skin contains ________ layers.
a 4; 5
b 3; 4
c 1; 2
d 2; 3
a 4;5
The layer of hard keratin that coats the hair is termed the
a root.
b hair bulb.
c medulla.
d cuticle.
d cuticle
Accessory structures of the skin include all of the following, except
a) hair follicles.
b) sebaceous glands.
c) sweat glands.
d) epidermis.
d epidermis
The layer of dividing cells at the base of the epidermis is the
a stratum granulosum.
b stratum spinosum.
c stratum basale.
d stratum lucidum.
e stratum corneum.
c stratum basale
The tough horny superficial layer of the epidermis is known as the
a stratum spinosum.
b stratum lucidum.
c stratum corneum.
d stratum basale.
e stratum granulosum.
c stratum corneum
Granulation tissue is composed of
a fibroblasts.
b none of the above
c clotted blood.
d all of the above
e an extensive capillary network.
d all of the above
In a penetrating wound, ________ divide to produce mobile cells that repair the dermis.
a) granulation cells
b) dendritic cells
c) macrophages
d) fibroblasts
e) muscle cells
d fibroblasts
Nail production occurs at the nail
a bed.
b root.
c body.
d cuticle.
b root
Large quantities of keratin are found in the epidermal layer called the
a) stratum corneum.
b) stratum lucidum.
c) stratum basale.
d) stratum granulosum.
e) stratum spinosum.
a stratum corneum
The layer of the epidermis that contains abundant desmosomes and dendritic cells is the
a) stratum corneum.
b) stratum lucidum.
c) stratum basale.
d) stratum granulosum.
e) stratum spinosum.
e stratum spinosum
An albino individual lacks the ability to produce
a melanin.
b keratin.
c carotene.
d perspiration.
e hemoglobin.
a melanin
The type of cells that form the strata in the epidermis are
a) adipocytes.
b) keratinocytes.
c) fibroblasts.
d) melanocytes.
b keratinocytes
The effects of aging on the skin include
a increased production of vitamin D.
b thickening of the epidermis.
c a decline in the activity of sebaceous glands
d an increased blood supply to the dermis.
c a decline in the activity of sebaceous glands
The layer of the skin that contains bundles of collagen and elastic fibers responsible for the strength of the skin is the ________ layer.
a subcutaneous
b reticular
c papillary
d epidermal
b reticular
The repair of the epidermis after a wound begins as basal cells produce new
a) elastic fibers.
b) collagen fibers.
c) reticular fibers.
d) keratinocytes.
d keratinocytes
While walking barefoot on the beach, Joe stepped on a thorn that penetrated through the sole of his foot to the dermis. How many layers of epidermis did the thorn penetrate?
a) 1
b) 3
c) 4
d) 5
d 5
Each of the following is a function of the integumentary system, except
a protection of underlying tissue.
b synthesis of vitamin C.
c maintenance of body temperature.
d excretion of salts and wastes.
b synthesis of vitamin D
Why would an elderly person be more prone to skin infections than a younger person?
a) Skin repairs take longer in the elderly.
b) The epidermis is thinner in the elderly.
c) There are fewer dendritic cells in the skin of the elderly.
d) all of the above
d all of the above
Glands that discharge an oily secretion into hair follicles are ________ glands.
a sebaceous
b apocrine sweat
c ceruminous
d merocrine sweat
e mammary
a sebaceous