Anatomy Integumentary System
What is the function of melanin?
It protects DNA from the damaging effects of ultraviolet radiation.
What specialized cell acts like a macrophage?
Langerhans cell
The condition that results from clogged sebaceous glands is
acne
What is the structure labeled 8?
arrector pili
A burn that destroys only the superficial cells of the epidermis, such as a mild sunburn, is classified as
first-degree
What is the structure labeled 6?
hair shaft
The loose connective tissue that separates the integument from deeper tissues and organs is called the
hypodermis or subcutaeneous layger
Which of the following is the correct order of the layers of the cutaneous membrane (deepest first)?
hypodermis, dermis, epidermis
The protein that contributes to many of the skin's protective qualities is called
keratin
Which of the following is not part of the integumentary system?
lungs
The pale crescent area of the nail is called the
lunula
Modified and specialized sweat glands that produce milk are called __________ glands.
mammary
In albinism, ___________ is lacking
melanin
In the figure above, the cell labeled B is a/an
melanocyte
This special cell acts as a receptor for neurons
merkel cell
Thick skin can be found on the
palms
Functions of the skin include
regulating body temperature
What is the structure labeled 7?
sebaceous gland
A burn that goes into the dermis is classified as what type of burn?
second degree
The arrector pili is made up of what type of muscle tissue?
smooth
A small amount of ultraviolet radiation is beneficial because it
stimulates vitamin D synthesis in the epidermis
The deepest layer of cells in the epidermis is the cells of the
stratum basale
The layer of the epidermis at the exposed surface is the
stratum corneum
What is the outermost layer of the epidermis that sheds dead skin cells?
stratum corneum
What layer of the epidermis determines if it is tough skin?
stratum lucidum
What is the structure labeled 10?
sudoriferous gland
When the arrector pili muscles contract,
"goose bumps" are formed
Which number identifies the epidermis?
1 (top layer)
Which number identifies the reticular layer of the dermis?
3 (bottom layer of dermis)
Which number identifies the dermis?
4 (middle layer)
Which number identifies the hypodermis?
5 (bottom layer)
What is the correct order of the parts of a hair shaft from the outside in?
cuticle, cortex, medulla
The dermis is composed largely of
dense irregular connective tissue.
Projections of loose connective tissue from the dermis, which extend upward between the adjacent ridges of the epidermis, are called
dermal papillae
The highly vascular layer of the skin, which provides thermoregulation via changing blood flow, is the
dermis
When the body is overheated, the skin responds by
dilating blood vessels.
As cells are pushed from the deeper portion of the epidermis toward the surface,
they die
The type of burn that injures the hypodermis, deeper tissues, and organs is a(n)
third-degree burn
Melanin serves to protect cells in the deeper layers of the epidermis from
ultraviolet radiation
Epidermal cells synthesize this vitamin when exposed to sunlight.
vitamin D