Chapter 06 Practice Test
11/06/12
As cells are pushed from the deeper portion of the epidermis toward the surface,
A.they divide continually.
B.their supply of nutrients improves.
C.they tend to die.
D.they become dermal cells.
The dermis is composed largely of
A.irregular dense connective tissue
B.loose connective tissue.
C.epithelial tissue.
D.adipose tissue.
Which of the following is not correct concerning the skin?
A.The dermis is usually thicker than the epidermis.
B.The epidermis is composed of stratified squamous epithelium.
C.The subcutaneous layer is between the dermis and the epidermis.
D.The dermis contains smooth muscle and nerve tissue.
Eccrine sweat glands
A.are most common in the armpits and groin.
B.respond primarily to elevated body temperature.
C.develop a scent as they are metabolized by skin bacteria
D.usually are associated with hair follicles.
Which of the following is a normal response to excessive loss of body heat in a cold environment?
A.Dermal blood vessels become constricted.
B.Sweat glands become inactive.
C.Skeletal muscles contract involuntarily.
D.All of these are correct.
Exposure to ultraviolet light causes the skin to darken by stimulating the production of
A.melanin.
B.carotene.
C.hemoglobin.
D.cyanin.
Sweat functions to cool the body by
A.convection.
B.conduction.
C.evaporation.
D.radiation.
Eccrine sweat glands differ from sebaceous glands
A.in terms of what is secreted.
B.in their location in the body.
C.because sebaceous glands are associated with hair follicles, whereas sweat glands are not.
D.All of these are correct.
What determines the color of skin?
A.the number of melanocytes in the epidermis
B.the thickness of the epidermis layer
C.the amount of melanin produced by melanocytes
D.None of these is correct.
The subcutaneous layer consists of
A.epithelial tissue.
B.loose connective tissue and adipose tissue.
C.epithelium and loose connective tissue.
D.adipose tissue and skeletal muscle tissue.
The means by which heat is lost from a warm surface to the air molecules continuously circulating over it is
A.radiation.
B.evaporation.
C.conduction.
D.convection.
Epidermal cells are supplied with nutrients from blood vessels located in the
A.epidermis.
B.dermis.
C.subcutaneous layer.
D.All of these are correct.
Skin cancer is most likely to develop from
A.pigmented epithelial cells and pigmented melanocytes
B.pigmented melanocytes and nonpigmented epithelial cells
C.nonpigmented epithelial cells and nonpigmented melanocytes
D.nonpigmented melanocytes and pigmented epithelial cells.
Which of the following is a characteristic of the person most likely to develop a cutaneous carcinoma?
A.over forty years of age
B.often works and plays outdoors
C.light-complexioned skin
D.All of these are correct.
As a person ages, the skin typically becomes
A.thinner
B.thicker
C.oilier
D.None of these is correct.
Skin cells play an important role in the production of
A.vitamin A.
B.vitamin B.
C.vitamin D.
D.vitamin E.
By producing hormonelike substances that influence the development of certain white blood cells, the skin plays a role in
A.immunity.
B.excretion.
C.circulation.
D.respiration.
Acne is a disorder involving the
A.sweat glands.
B.hair follicles.
C.sebaceous glands.
D.apocrine glands.
Elderly persons may become less able to maintain stable body temperatures because
A.the number of sweat glands decreases.
B.the number of blood vessels decreases.
C.their ability to shiver declines.
D.All of these are correct.
When a person exercises on hot, humid days, there is a danger of developing
A.fatigue and dizziness.
B.heat exhaustion.
C.headache, muscle cramps, and nausea.
D.All of these are correct.
The granulations that appear during the healing of a large, open wound are composed mainly of
A.blood clots.
B.numerous phagocytic cells.
C.fibroblasts surrounding blood vessels.
D.scar tissue.
A burn that involves only the epidermis is called a
A.superficial partial-thickness burn.
B.deep partial-thickness burn.
C.second degree burn.
D.third degree burn.
An autograft involves covering an injured area of skin with
A.skin from a person other than the patient.
B.a skin substitute, such as an artificial membrane.
C.skin from a skin bank.
D.skin from an uninjured region of the patient's body.
In treating a burned patient, the "rule of nines" is used to estimate the
A.depth of the burn.
B.surface area of the burn.
C.time needed for healing.
D.type of scar that will form.
The functions of skin include
A.synthesizing antibodies.
B.producing adipose tissue.
C.regulating body temperature.
D.synthesizing digestive enzymes.
Epidermis is distinguished by being ______, whereas dermis is distinguished by being ______.
A.the innermost layer of the skin; under the epidermis
B.composed of largely fibrous connective tissue; composed of stratified squamous epithelial tissue
C.the outermost layer of the skin; composed of stratified squamous epithelial tissue
D.composed of stratified squamous epithelial tissue; composed of irregular dense connective tissue
Inflammation involves which of the following changes to skin?
A.reddened appearance
B.swollen and painful to touch
C.warm temperature
D.All of these are correct.
A hair is distinguished from a hair follicle by
A.being composed of living stratified squamous cells, whereas a hair follicle is composed of dead dermal cells.
B.originating in the subcutaneous layer, whereas a hair follicle originates from the dermis.
C.strictly the position, with the hair being in the center of the follicle.
D.being composed of dead epidermal cells, whereas a hair follicle is composed of living epidermal cells.
The subcutaneous layer can be described as
A.being composed of loose connective tissue and adipose tissue.
B.binding the skin to underlying organs.
C.functioning as a heat insulator or helping to conserve body heat.
D.All of these are correct.
The way in which the skin promotes loss of excess body heat is
A.dilation of dermal blood vessels.
B.activation of eccrine sweat glands to release more sweat to skin surface.
C.loss of heat by radiation, conduction, and convection.
D.All of these are correct.
Body heat is lost by radiation by
A.heat moving from the body into cooler objects in contact with its surface.
B.moving into cooler air that is continually circulating over the skin.
C.heat rays escaping to cooler surroundings.
D.water changing from a liquid state to a gaseous state.
Which of the following steps occurs first after formation of a scab?
A.phagocytic cells remove dead material
B.scab sloughs off
C.fibroblasts from wound edge form new collagenous fibers
D.blood vessels send out new branches under scab
The fine layer of downy hair that covers a baby at birth is called
A.vernix
B.down
C.infant fuzz
D.lanugo
The condition in which the lanugo does not recede and persists is called
A.hyperfolliculitis
B.hypertrichosis
C.hirsutism
D.Lupine syndrome
Exposure to ultraviolet radiation greatly increases the risk of developing
A.heart disease
B.diabetes
C.skin cancer
D.glaucoma
Tattoos are permanent because
A.the dyes are injected into the dermis.
B.the dyes can never be broken down.
C.the needles inject large volumes.
D.the dyes are engraved into the epidermis.
Why are tattoos permanent if the dyes are injected into the dermis?
A.The dyes cannot be broken down.
B.There are no blood vessels in the dermis.
C.The dermis is not shed.
D.The hypodermic injects plastic with the dye.
A(n) ______is an example of a transplant within the same individual.
A.xenograft
B.autograft
C.homograft
D.dermograft
A(n) ______is an example of a transplant from person to person.
A.xenograft
B.autograft
C.homograft
D.dermograft
The skin is one of the larger organs of the body.
TrueFalse
In healthy skin, the production of epidermal cells is closely balanced with the loss of skin cells.
TrueFalse
When the body temperature drops below normal, dermal blood vessels are likely to dilate.
TrueFalse
Melanocytes can transfer granules of melanin into nearby epithelial cells.
TrueFalse
The secretion of the sebaceous glands is called sebum.
TrueFalse
The major blood vessels that supply the skin are located between the dermis and the epidermis.
TrueFalse
The outermost layer of the epidermis is stratum basale and the innermost layer is stratum corneum.
TrueFalse
The function of melanocytes is to synthesize melanin, which protects underlying cells from the effects of ultraviolet light.
TrueFalse
If the temperature of the body drops below the normal range, the skin responds by constricting epidermal blood vessels, activating sweat glands, and inactivating muscles.
TrueFalse
Sunlight, ultraviolet light, and X rays all cause skin to darken because they cause an increase in blood flow to the dermis.
TrueFalse
Carcinomas appear most often in the skin of the neck, face, and scalp.
TrueFalse
Sebaceous glands secrete sebum, which functions to destroy bacteria that may be present on the skin.
TrueFalse
Epidermal cells that move up through the strata become very keratinized as they die due to a lack of blood supply.
TrueFalse
Melanin production is greater in the skin of people who live outdoors all the time than in people who do not.
TrueFalse
Skin cancers originating from epithelial cells are called melanomas and those arising from melanocytes are called carcinomas.
TrueFalse
Carcinomas are rarer than melanomas and occur primarily in people who work indoors but occasionally experience blistering sunburns during weekend activity.
TrueFalse
Melanomas appear most often in the skin of the trunk, especially in the back, or in the skin of the limbs.
TrueFalse
Typically, a melanoma spreads through the skin horizontally but can grow downward into the dermis and can even invade deeper tissues.
TrueFalse
A burn that involves the epidermis only is called a deep partial-thickness burn.
TrueFalse