Bio 168 Integumentary System- Application Questions
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36 Terms
Which characteristic of the epidermis makes it especially suited to resist abrasion and water loss?
Stratified squamous epithelium with keratinization
3 multiple choice options
Why is the dermis more effective than the epidermis at supplying nutrients to cells?
It is highly vascularized connective tissue
3 multiple choice options
Which layer of the skin anchors it to deeper tissues and stores fat?
Subcutaneous tissue (hypodermis)
3 multiple choice options
Which best explains why thick skin (palms and soles) lacks hair?
Hair growth would interfere with friction ridges and grip
3 multiple choice options
Which of the following is the main protective function of melanin in the skin?
Shields DNA from ultraviolet radiation
3 multiple choice options
Which cell type would be most directly responsible for initiating an immune response in the epidermis?
Langerhans (dendritic) cell
3 multiple choice options
Which cell type is best matched with its function?
Keratinocyte - forms protective barrier
3 multiple choice options
A patient has lost tactile sensitivity in a localized patch of skin. Which cells are likely damaged?
Merkel cells
3 multiple choice options
Why do keratinocytes at the surface of the skin eventually die?
They are too far from dermal blood supply
3 multiple choice options
If melanocytes stopped transferring melanosomes to keratinocytes, what would likely occur?
Greater risk of UV-induced DNA damage
3 multiple choice options
Which epidermal layer contains cells that are actively dividing to replace lost surface cells?
Stratum basale
3 multiple choice options
In which epidermal layer would you expect to find dead, keratin-filled cells forming a barrier?
Stratum corneum
3 multiple choice options
The stratum lucidum is only found in
Thick, hairless skin such as palms and soles
3 multiple choice options
Which sequence correctly lists the order of epidermal layers in thick skin from deepest to most superficial?
Basale → Spinosum → Granulosum → Lucidum → Corneum
3 multiple choice options
Which dermal structure is most responsible for fingerprints?
Dermal papillae
3 multiple choice options
Why do incisions made parallel to cleavage lines heal faster
Less disruption of collagen bundles
3 multiple choice options
Flexure lines are most visible in which locations?
Palms, fingers, and toes
3 multiple choice options
Which component gives the dermis its ability to stretch and recoil?
Elastic fibers
3 multiple choice options
Why might a deep cut into the reticular layer bleed significantly?
It contains dense vascular networks
3 multiple choice options
A patient with liver disease presents with yellow skin. Which pigment is responsible?
Bilirubin
3 multiple choice options
A person with cyanosis is most likely experiencing:
Reduced oxygenation of hemoglobin
3 multiple choice options
A fair-skinned person becomes flushed after exercise. What is the physiological cause?
Dilation of dermal blood vessels
3 multiple choice options
A patient has bronze-colored skin, suggesting:
Addison's disease (low adrenal hormones)
3 multiple choice options
Which condition is most likely if someone's skin is pale during emotional stress?
Pallor
3 multiple choice options
What causes goosebumps?
Contraction of arrector pili muscles
3 multiple choice options
Which gland type is correctly matched with its secretion?
Sebaceous - oily sebum
3 multiple choice options
Why are third-degree burns initially painless?
Nerve endings in the dermis are destroyed
3 multiple choice options
A firefighter has burns covering 27% of his body surface with second-degree burns.
Critical, because >25% of body has second-degree burns
3 multiple choice options
Which of the following best describes the primary composition of eccrine sweat?
Mostly water, salts, and metabolic wastes
3 multiple choice options
Unlike eccrine sweat, apocrine sweat also contains:
Proteins and fatty substances
3 multiple choice options
Which of the following best explains how the integumentary system helps regulate body temperature?
By producing sweat and dilating or constricting blood vessels
3 multiple choice options
The skin provides protection against which of the following?
UV radiation, bacterial invasion, and mechanical injury
3 multiple choice options
Which function of the integumentary system is most directly related to vitamin D production?
Absorption of calcium from the diet
3 multiple choice options
A patient who has lost a large portion of their skin from severe burns is at greatest immediate risk of:
Rapid dehydration and infection
3 multiple choice options
A patient presents with a burn that destroys both the epidermis and the dermis, often requiring skin grafts. Which type of burn is this?
Third-degree burn
3 multiple choice options
Which of the following explains why apocrine sweat glands often produce noticeable body odor?
Bacteria metabolize proteins and lipids in the sweat
3 multiple choice options
