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NURS 5432 DERMATOLOGIC DISORDERS 2026/2027 |
Complete Solutions | UTA | Pass Guaranteed - A+
Graded
SECTION 1: Skin Anatomy & Physiology (Q1–Q8)
Q1: A 42-year-old patient presents with a partial-thickness burn involving the
epidermis and superficial dermis. The nurse practitioner explains that the epidermis is
primarily responsible for which fundamental protective function?
A. Thermoregulation through eccrine sweat gland secretion
B. Providing a physical barrier against pathogen invasion and water loss [CORRECT]
C. Sensation of pressure and vibration through Pacinian corpuscles
D. Immune surveillance via Langerhans cell antigen presentation only
Correct Answer: B
Rationale: The epidermis serves as the primary physical barrier against microbial
entry and transepidermal water loss via the stratum corneum. While Langerhans cells
in the epidermis participate in immune surveillance (Option D), the principal function
is barrier protection; thermoregulation (Option A) is primarily a dermal function, and
deep pressure sensation (Option C) occurs in the subcutaneous tissue.
Q2: Which layer of the epidermis contains keratinocytes that are undergoing active
mitosis and serves as the regenerative foundation for epidermal renewal?
A. Stratum corneum
B. Stratum basale [CORRECT]
C. Stratum granulosum
D. Stratum lucidum
Correct Answer: B
,2
Rationale: The stratum basale (basal layer) contains mitotically active keratinocytes
and melanocytes that continuously regenerate the upper epidermal layers. The
stratum corneum (Option A) consists of dead, anucleated corneocytes; the stratum
granulosum (Option C) contains keratohyalin granules but is not mitotically active;
and the stratum lucidum (Option D) is a thin translucent layer found only in thick
skin.
Q3: A patient with anhidrosis is unable to sweat adequately during heat exposure.
The nurse practitioner recognizes that this thermoregulatory dysfunction implicates
which skin appendage located primarily within the dermis?
A. Sebaceous gland
B. Eccrine sweat gland [CORRECT]
C. Apocrine sweat gland
D. Hair follicle
Correct Answer: B
Rationale: Eccrine sweat glands, located throughout the dermis and concentrated on
the palms, soles, and forehead, are the primary thermoregulatory organs responsible
for evaporative cooling. Sebaceous glands (Option A) produce sebum for lubrication;
apocrine glands (Option C) are scent glands concentrated in axillary and anogenital
regions; and hair follicles (Option D) provide sensory and protective functions but
not thermoregulatory sweating.
Q4: Melanocytes originate embryologically from which structure and migrate to the
epidermis to produce melanin for photoprotection?
A. Mesoderm
B. Neural crest [CORRECT]
C. Surface ectoderm
,3
D. Endoderm
Correct Answer: B
Rationale: Melanocytes are derived from neural crest cells and migrate to the
epidermis during embryonic development to synthesize melanin for UV protection.
The epidermis itself originates from surface ectoderm (Option C), while the dermis
arises from mesoderm (Option A); endoderm (Option D) gives rise to internal organs,
not cutaneous structures.
Q5: During a skin examination, the nurse practitioner notes that a lesion blanches
with diascopy. This blanching indicates that the erythema is due to blood within
which vascular structure?
A. Post-capillary venules undergoing extravasation
B. Superficial dermal capillaries with intact vessel walls [CORRECT]
C. Subcutaneous arterioles supplying adipose tissue
D. Deep dermal vascular plexus with thrombosis
Correct Answer: B
Rationale: Blanching with diascopy occurs when pressure forces blood out of intact
superficial dermal capillaries, indicating non-hemorrhagic erythema. Non-blanching
lesions (Options A, D) suggest extravasated blood (petechiae, purpura) or vascular
occlusion; subcutaneous arterioles (Option C) are too deep to cause visible surface
blanching.
Q6: Which cell type within the epidermis functions as the primary antigen-presenting
cell and plays a critical role in cutaneous immune surveillance?
A. Merkel cell
B. Langerhans cell [CORRECT]
, 4
C. Melanocyte
D. Fibroblast
Correct Answer: B
Rationale: Langerhans cells are dendritic antigen-presenting cells residing in the
epidermis that capture foreign antigens and present them to T-lymphocytes. Merkel
cells (Option A) are mechanoreceptors; melanocytes (Option C) produce pigment;
and fibroblasts (Option D) are dermal cells responsible for collagen synthesis.
Q7: A 68-year-old patient presents with thin, fragile skin that tears easily with minor
trauma. The nurse practitioner attributes this finding to age-related degeneration of
which dermal component?
A. Stratum corneum lipid matrix
B. Collagen and elastin fibers [CORRECT]
C. Melanin granules within keratinocytes
D. Subcutaneous adipose tissue
Correct Answer: B
Rationale: Age-related dermal atrophy involves degradation of collagen and elastin
fibers, leading to decreased skin elasticity, thinning, and increased fragility. The
stratum corneum (Option A) may become drier but does not primarily cause tearing;
melanin (Option C) provides photoprotection but not structural integrity; and
subcutaneous fat (Option D) provides cushioning but not tensile strength.
Q8: A patient with vitiligo has patchy depigmentation. The nurse practitioner
analyzes that this autoimmune destruction specifically targets which cell type, and
what is the secondary consequence regarding UV protection?
A. Keratinocytes; resulting in impaired barrier function
NURS 5432 DERMATOLOGIC DISORDERS 2026/2027 |
Complete Solutions | UTA | Pass Guaranteed - A+
Graded
SECTION 1: Skin Anatomy & Physiology (Q1–Q8)
Q1: A 42-year-old patient presents with a partial-thickness burn involving the
epidermis and superficial dermis. The nurse practitioner explains that the epidermis is
primarily responsible for which fundamental protective function?
A. Thermoregulation through eccrine sweat gland secretion
B. Providing a physical barrier against pathogen invasion and water loss [CORRECT]
C. Sensation of pressure and vibration through Pacinian corpuscles
D. Immune surveillance via Langerhans cell antigen presentation only
Correct Answer: B
Rationale: The epidermis serves as the primary physical barrier against microbial
entry and transepidermal water loss via the stratum corneum. While Langerhans cells
in the epidermis participate in immune surveillance (Option D), the principal function
is barrier protection; thermoregulation (Option A) is primarily a dermal function, and
deep pressure sensation (Option C) occurs in the subcutaneous tissue.
Q2: Which layer of the epidermis contains keratinocytes that are undergoing active
mitosis and serves as the regenerative foundation for epidermal renewal?
A. Stratum corneum
B. Stratum basale [CORRECT]
C. Stratum granulosum
D. Stratum lucidum
Correct Answer: B
,2
Rationale: The stratum basale (basal layer) contains mitotically active keratinocytes
and melanocytes that continuously regenerate the upper epidermal layers. The
stratum corneum (Option A) consists of dead, anucleated corneocytes; the stratum
granulosum (Option C) contains keratohyalin granules but is not mitotically active;
and the stratum lucidum (Option D) is a thin translucent layer found only in thick
skin.
Q3: A patient with anhidrosis is unable to sweat adequately during heat exposure.
The nurse practitioner recognizes that this thermoregulatory dysfunction implicates
which skin appendage located primarily within the dermis?
A. Sebaceous gland
B. Eccrine sweat gland [CORRECT]
C. Apocrine sweat gland
D. Hair follicle
Correct Answer: B
Rationale: Eccrine sweat glands, located throughout the dermis and concentrated on
the palms, soles, and forehead, are the primary thermoregulatory organs responsible
for evaporative cooling. Sebaceous glands (Option A) produce sebum for lubrication;
apocrine glands (Option C) are scent glands concentrated in axillary and anogenital
regions; and hair follicles (Option D) provide sensory and protective functions but
not thermoregulatory sweating.
Q4: Melanocytes originate embryologically from which structure and migrate to the
epidermis to produce melanin for photoprotection?
A. Mesoderm
B. Neural crest [CORRECT]
C. Surface ectoderm
,3
D. Endoderm
Correct Answer: B
Rationale: Melanocytes are derived from neural crest cells and migrate to the
epidermis during embryonic development to synthesize melanin for UV protection.
The epidermis itself originates from surface ectoderm (Option C), while the dermis
arises from mesoderm (Option A); endoderm (Option D) gives rise to internal organs,
not cutaneous structures.
Q5: During a skin examination, the nurse practitioner notes that a lesion blanches
with diascopy. This blanching indicates that the erythema is due to blood within
which vascular structure?
A. Post-capillary venules undergoing extravasation
B. Superficial dermal capillaries with intact vessel walls [CORRECT]
C. Subcutaneous arterioles supplying adipose tissue
D. Deep dermal vascular plexus with thrombosis
Correct Answer: B
Rationale: Blanching with diascopy occurs when pressure forces blood out of intact
superficial dermal capillaries, indicating non-hemorrhagic erythema. Non-blanching
lesions (Options A, D) suggest extravasated blood (petechiae, purpura) or vascular
occlusion; subcutaneous arterioles (Option C) are too deep to cause visible surface
blanching.
Q6: Which cell type within the epidermis functions as the primary antigen-presenting
cell and plays a critical role in cutaneous immune surveillance?
A. Merkel cell
B. Langerhans cell [CORRECT]
, 4
C. Melanocyte
D. Fibroblast
Correct Answer: B
Rationale: Langerhans cells are dendritic antigen-presenting cells residing in the
epidermis that capture foreign antigens and present them to T-lymphocytes. Merkel
cells (Option A) are mechanoreceptors; melanocytes (Option C) produce pigment;
and fibroblasts (Option D) are dermal cells responsible for collagen synthesis.
Q7: A 68-year-old patient presents with thin, fragile skin that tears easily with minor
trauma. The nurse practitioner attributes this finding to age-related degeneration of
which dermal component?
A. Stratum corneum lipid matrix
B. Collagen and elastin fibers [CORRECT]
C. Melanin granules within keratinocytes
D. Subcutaneous adipose tissue
Correct Answer: B
Rationale: Age-related dermal atrophy involves degradation of collagen and elastin
fibers, leading to decreased skin elasticity, thinning, and increased fragility. The
stratum corneum (Option A) may become drier but does not primarily cause tearing;
melanin (Option C) provides photoprotection but not structural integrity; and
subcutaneous fat (Option D) provides cushioning but not tensile strength.
Q8: A patient with vitiligo has patchy depigmentation. The nurse practitioner
analyzes that this autoimmune destruction specifically targets which cell type, and
what is the secondary consequence regarding UV protection?
A. Keratinocytes; resulting in impaired barrier function
