Anatomy and Physiology Unit 3 Part 2
When a person becomes "pale," what is the physiologic basis?
The blood supply to the skin decreases.
Thin skin is defined by the thickness of the
epidermis.
The layer of the epidermis at the surface is the
stratum comeum.
As cells are pushed from the deeper portion of the epidermis toward the surface,
they die.
Eccrine and sebaceous glands differ in
type of secretion, material secreted, location in the body, and their association with hair follicles (all of the above).
When the arrector pili muscles contract,
"goose bumps" are formed.
Epidermal cells synthesize this vitamin when exposed to sunlight.
Vitamin D3
The condition that results from clogged sebaceous glands is
acne.
The hypodermis contains mostly
adipose tissue.
The glands that develop at puberty are
apocrine glands.
Eccrine sweat glands
are most common in the axilla and groin, respond primarily to elevated body temperature, respond only in times of stress, and are active only in areas of dense hair (all of the above).
Exposure of the skin to ultraviolet light
can stimulate the production of melanin.
The skin is also called the
cutaneous membrane.
The fold of the stratum comeum over the base of a nail is called the
cuticle.
Shafts of hair are made by
dead epidermal cells.
The dermis is composed largely of
dense irregular connective tissue.
Folds of the dermis that cause fingerprints are called
dermal ridges.
Epidermal cells are supplied with nutrients from blood vessels in the
dermis.
Which of the following is the correct order of the cutaneous membrane?
epidermis, dermis, hypodermis
Sweat helps to cool the body by
evaporation.
A burn that involves only the epidermis, such as a mild sunburn, is classified as
first degree.
Accessory structures of the skin include
hair follicles, arrector pili muscles, sebaceous sweat glands, and apocrine sweat glands (all of the above).
Nerve fibers in the skin are associated with
hair follicles.
Injections made under the skin are called
hypodermal injections.
The tissue under the skin is called the
hypodermis or subcutaneous layer.
When the body is overheated, the skin responds by
increasing blood flow to the dermis.
Perspiration produced by apocrine sweat glands
is more than 99% water, contains electrolytes and waste products, helps to cool the body when it evaporates, and is limited to hair follicles of the axilla, nipples, and groin (all of the above).
The pigment melanin
is produced by cells called melanocytes and is found in higher concentration with darker skin and protects DNA from the damaging effects of UV radiation.
The skin may turn orange as a result of _____ buildup.
keratin
The subcutaneous layer is made of
loose connective and adipose tissues.
In albinism, _____ is lacking.
melanin
The most severe type of skin cancer is most likely to develop from
melanocytes.
Thick skin can be found on the
palms.
Functions of the skin include
regulating body temperature.
This type of burn appears inflamed and tender but has no blisters.
second-degree burn
A burn that penetrates the epidermis and part of the dermis is classified as a
second-degree burn.
The layer of the skin that provides thermoregulation via changing blood flow is the
subcutaneous layer.