Unit 5 Integumentary System
What is the composition of the papillary layer of the dermis?
Areolar connective tissue
The loose connective tissue that separates the integument from deeper tissues and organs is the called the
hypodermis or subcutaneous layer
A thickened area of scar tissue that is covered by a shiny, smooth epidermal surface is called a
keloid
The protein that contributes to many of the skin's protective qualities is called
keratin
The pale crescent area of the nail is called the
lunula
Modified and specialized sweat glands that produce milk are called
mammary glands
In albinism what is lacking
melanin
The observed differences in skin color reflect the levels of what production
melanin
The most severe type of skin cancer is most likey to develop from
melanocytes
What covers the nail bed?
nail body
thick skin can be found on the
palms
Exposure of the skin to UV light
can slowly increase melanoacyte activity
The skin may turn orange as a result of what buildup
carotene
What is a pigment found in veggies that can make skin appear orange or yellow
carotene
The skin is also called the
cutaneuous membrane
The fold of the stratum corneum over the base of a nail is called the
cuticle
Shafts of hair are compromised of
dead keratinized epidermal cells
The dermis is composed largely of
dense irregular connective
Projections of the loose connective tissue from the dermis, which extend upward between the adjacent ridges of the epidermis are called the
dermal papillae
The highly vascular layer of the skin, which provides thermoregulation via changed blood flow is the
dermis
epidermal cells are supplied with nutrients from blood vessels in the
dermis
As cells are pushed form the deeper portion of the epidermis toward the surface they
die
When the body overheats, the skin responds by
dilating blood vessels
A small amount of UV radiation is beneficial because it stimulates vitamin D3 synthesis in the
epidermis
Thin skin is defined by the thickness of the
epidermis
Which of the following is the correct order of the layers of the cutaneous membrane?
epidermis, dermis, and hypodermis
When the arrector pilli muscles contract
goose bumps are formed
Hair is formed by the repeated divisions of epithelial stem cells in which structure?
hair matrix
The glands that begin discharging a sticky, cloudy, and potentially odorous secretion at puberty are called what?
Apocrine glands
Which of the following conditions is the most common form of skin cancer?
Basal cell carcinoma
Correct order of the cells layers, strata, in the thick skin, from basement membrane to free surface
Basale, spinosum, granulosum, lucidum, corneum
Which type of burn appears inflamed and feels tender but has no blisters?
First degree
Through which mechanism does perspiration function in cooling the body?
Evaporation
During skin repair, most the scab consists of an insoluble network of what? It is a protein that forms from blood proteins during the clotting response?
Fibrin
During the regeneration process of the skin after injury, what is the combination of blood clot, fibroblasts, and an extensive capillary network called?
Graulosum
Perspiration that is produced by apocrine sweat glands
Is limited to the hair follicles of the axilla, nipples, and groin
What is the function of melanin?
It protects DNA from the damaging effects of UV radiation
The reticular layer's collagen fibers directly provide which function?
Prevent damage to the tissue
Which of the following is the function of hair associated with a nerve fiber?
Provides an early-warning system that may help prevent injury
Why are injections administered in the hypodermis when administering drugs using a hypodermis needle?
There are no vital organs in the region
Melanin serves to protect cells in the deeper layers of the epidermis from
UV radiation
the condition that results from clogged sebaceous glands is
acne
In other mammals which glands function as scent glands, providing an important form of communication
apocrine
The subcutaneous layer consists of
areolar and adipose tissues
functions of the skin include
regulating body temp
What is the layer of the skin that contains bundles of collagen fivers and elastin, and it is responsible for the mechanical strength and flexibility of the skin
reticular
The deepest layer of cells in the epidermis is the cells of the
stratum basale
The epidermal layer whose cells have stopped dividing and started to produce large amounts of keratin the
stratum basale
The layer of the epidermis at the exposed surface is the
stratum corneum
When a person becomes "pale", what is the physiologic basis?
the blood supply to the skin decreases
The type of burn that injures the hypodermis, deeper tissues, and organs is a
third degree burn
