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| 1 | |
A major function of the skin is protection from |
| | A) | abrasion. |
| | B) | ultraviolet light. |
| | C) | entry of microorganisms. |
| | D) | dehydration. |
| | E) | all of these |
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| 2 | |
The layer of skin that is composed of dense connective tissue and has projections called papillae is the |
| | A) | dermis. |
| | B) | hypodermis. |
| | C) | stratum corneum. |
| | D) | stratum basale |
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| 3 | |
This layer has about half of the body's stored fat: |
| | A) | dermis |
| | B) | hypodermis |
| | C) | stratum corneum |
| | D) | stratum basale |
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| 4 | |
In which of these layers are melanocytes found? |
| | A) | dermis |
| | B) | hypodermis |
| | C) | stratum corneum |
| | D) | stratum basale |
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| 5 | |
The layer that consists of many layers of dead squamous cells surrounded by lipids is the |
| | A) | dermis. |
| | B) | hypodermis. |
| | C) | stratum corneum. |
| | D) | stratum basale |
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| 6 | |
Which of these statements is true regarding keratinization? |
| | A) | The deepest cells are located in the stratum corneum. |
| | B) | Epithelial cells eventually die and produce an outer layer of cells. |
| | C) | The stratum corneum has cuboidal or columnar cells that undergo mitotic division. |
| | D) | The stratum basale can thicken to produce a callus. |
| | E) | The newest cells are found in the outer layer of cells |
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| 7 | |
Cyanosis is a condition caused by |
| | A) | consuming large amounts of carotene. |
| | B) | increased blood flow to the skin. |
| | C) | albinism. |
| | D) | exposure to ultraviolet light. |
| | E) | a decrease in blood oxygen. |
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| 8 | |
Hair is formed from epithelial cells of the |
| | A) | hair bulb. |
| | B) | dermis. |
| | C) | hypodermis. |
| | D) | cuticle. |
| | E) | hair shaft. |
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| 9 | |
Scalp hairs can grow longer than eyelash hairs because |
| | A) | the head has a better blood supply than the eyelid. |
| | B) | the hair follicles in the scalp are much deeper than follicles in the eyelid. |
| | C) | the scalp hairs are more exposed to the sun, which stimulates growth. |
| | D) | the growth stage for scalp hairs is longer than for eyelash hairs. |
| | E) | the eyelash hair shaft consists of columns of dead keratinized epithelial cells. |
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| 10 | |
After the resting stage of hair growth, each hair normally |
| | A) | grows more rapidly. |
| | B) | falls out. |
| | C) | loses its pigmentation. |
| | D) | produces more melanocytes. |
| | E) | increases the depth of the hair follicle. |
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| 11 | |
Given these characteristics: produce a thick, odorless secretion rich in organic substances; open into a hair follicle; and become active at puberty, Which glands of the skin have all these characteristics? |
| | A) | apocrine sweat glands |
| | B) | merocrine sweat glands |
| | C) | sebaceous glands |
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| 12 | |
Nails |
| | A) | grow from the nail matrix. |
| | B) | have a resting stage, similar to hair. |
| | C) | have a visible part, which is the nail bed. |
| | D) | have an eponychium, which is the whitish, crescent-shaped area at the base of the nail. |
| | E) | contain proteoglycans and chondrocytes. |
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| 13 | |
Which of these statements is NOT true regarding the temperature regulation function of the skin? |
| | A) | As sweat evaporates from the skin, it carries away heat and drops body temperature. |
| | B) | When body temperature increases, blood vessels in the epidermis dilate to transfer heat to the skin. |
| | C) | The skin can lose heat by radiation, conduction, evaporation, or convection. |
| | D) | If skin temperature falls below about 59° F, blood vessels in the skin dilate. |
| | E) | As body temperature first drops below normal, dermal blood vessels constrict. |
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| 14 | |
As a result of aging, the skin |
| | A) | increases the amount of collagen in the dermis. |
| | B) | becomes thicker. |
| | C) | loses elastic fibers. |
| | D) | has increased activity of the sebaceous and sweat glands. |
| | E) | generally increases the amount of melanin produced. |
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| 15 | |
Given these characteristics: epidermis and dermis destroyed, painless, also called "full-thickness burn" and much scar tissue formed, Which of these types of burns is described by all these characteristics? |
| | A) | first-degree burn |
| | B) | second-degree burn |
| | C) | third-degree burn |
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