Integumentary System Quiz
Questions: 16 · 10 minutes
1. A burn causes blistering because the epidermis separates from tissue below it. Which description best fits the injury?
Only the outermost dead cells are affected
Only the hypodermal fat is affected
The epidermis and part of the dermis are damaged
The entire skin and all underlying muscle are destroyed
2. A hair follicle becomes oily because a nearby gland releases sebum into it. Which gland is responsible?
Sebaceous gland
Ceruminous gland
Eccrine sweat gland
Endocrine gland
3. A shallow abrasion removes part of the epidermis but leaves the dermis intact. Which cells are most important for replacing the lost epidermal cells?
Mature cells of the stratum corneum
Cartilage cells beneath the skin
Adipocytes in the hypodermis
Dividing keratinocytes in the stratum basale
4. Which substances make up most of the excretory material released in sweat?
Undigested food particles and digestive enzymes
Carbon dioxide and concentrated bile pigments
Water and salts, with small amounts of urea and other solutes
Large proteins and intact blood cells
5. In cold conditions, tiny muscles attached to hair follicles contract and produce goosebumps. What are these muscles called?
Erector spinae muscles
Orbicular muscles
Papillary muscles
Arrector pili muscles
6. A very light scrape removes only flattened, dead cells and does not bleed. Which layer was primarily affected?
Reticular layer of the dermis
Stratum corneum
Stratum basale
Hypodermis
7. Which integumentary function begins when ultraviolet B radiation acts on a precursor molecule in the skin?
Bile production
Insulin secretion
Red blood cell formation
Vitamin D synthesis
8. Which group consists entirely of structures in the integumentary system?
Skin, cartilage, ligaments, and tendons
Skin, hair, nails, and cutaneous glands
Hair, bones, skeletal muscles, and nails
Skin, lymph nodes, blood vessels, and bone marrow
9. Which feature most directly helps the epidermis limit water loss and block many external substances?
A dense network of epidermal capillaries
A surface layer made mainly of collagen fibers
Keratinized cells and extracellular lipids in the outer epidermis
Continuous mucus secretion from hair follicles
10. A person’s palms become sweaty before giving a speech. Which structures produce this watery secretion?
Sebaceous glands concentrated beside facial hairs
Apocrine glands opening mainly into axillary hair follicles
Ceruminous glands lining the external ear canal
Eccrine glands, which are abundant on the palms
11. An injury damages nerves, blood vessels, and sweat glands but leaves deeper fatty tissue intact. Which region is most directly affected?
Dermis
Epidermis only
Nail plate
Hair shaft only
12. The epidermis has no blood vessels. How do its living cells obtain oxygen and nutrients?
They absorb them directly from the surrounding air
They produce them inside sweat glands
They receive them by diffusion from blood vessels in the dermis
They receive them through hair shafts
13. Where are the actively dividing cells primarily responsible for fingernail growth located?
Nail matrix
Nail plate surface
Free edge
Hyponychium alone
14. During exercise on a hot day, which response most directly increases heat loss through the skin?
Dermal blood vessels constrict while sebum production rises
Sweat evaporates while dermal blood vessels dilate
Melanocytes release more pigment as body temperature rises
Arrector pili muscles contract and trap a thicker air layer
15. How does the skin’s role in excretion compare with the kidneys’ role?
The skin removes small amounts in sweat, while the kidneys perform most regulated waste removal
The skin removes most nitrogenous waste, while the kidneys mainly control temperature
The two organs remove equal amounts of the same wastes
The kidneys remove waste only when sweat glands are inactive
16. After repeated ultraviolet exposure, which epidermal cells can increase melanin production to help absorb ultraviolet radiation?
Fibroblasts
Melanocytes
Adipocytes
Osteocytes