NR 606 FINAL ACTUAL EXAM – NEW UPDATED VERSION
Complete Accurate Questions – Well Elaborated Answers –
Correct Verified – Pass Guaranteed - A+ Graded
Part 1: Advanced Pathophysiology & Disease Mechanisms
Q1: A 58-year-old smoker with chronic bronchitis has areas of squamous metaplasia
identified on bronchial biopsy. The APRN recognizes that metaplasia in this setting
represents which type of cellular adaptation?
A. An irreversible change that always progresses to dysplasia
B. A reversible change in which one mature cell type is replaced by another mature cell
type [CORRECT]
C. An increase in cell number leading to tissue enlargement
D. A decrease in cell size due to reduced workload
Correct Answer: B
Rationale: The best answer is B. Metaplasia is defined as a reversible change where one
differentiated cell type is substituted by another differentiated cell type, often as an
adaptive response to chronic irritation. In the airways, chronic smoking irritation causes
columnar ciliated epithelium to transform into squamous epithelium. This is a
protective adaptation, though it can become dysplastic over time if the irritant persists.
,Q2: A patient presents with a swollen, erythematous, warm ankle following a penetrating
wound. Synovial fluid analysis shows numerous neutrophils. Which inflammatory
mediator is primarily responsible for the vasodilation and increased vascular
permeability seen in this acute response?
A. Interleukin-1 (IL-1)
B. Histamine and bradykinin [CORRECT]
C. Transforming growth factor-beta (TGF-β)
D. Interferon-gamma (IFN-γ)
Correct Answer: B
Rationale: The best answer is B. In acute inflammation, histamine released from mast
cells and basophils, along with bradykinin from the kinin system, are the primary
mediators causing vasodilation and increased vascular permeability. These are the early
responders that produce the classic signs of rubor and tumor, while IL-1 and IFN-γ are
more involved in later immune modulation and chronic responses.
Q3: A 35-year-old patient with systemic lupus erythematosus has elevated anti-dsDNA
antibodies and low complement levels during a disease flare. Which underlying
immunologic mechanism best explains this pattern?
A. Type I hypersensitivity mediated by IgE
B. Type II hypersensitivity with antibody-mediated cytotoxicity
C. Type III hypersensitivity with immune complex deposition [CORRECT]
D. Type IV hypersensitivity with T-cell mediated destruction
,Correct Answer: C
Rationale: The best answer is C. SLE is the prototype for type III hypersensitivity, where
autoantibodies form immune complexes with nuclear antigens like dsDNA. These
complexes deposit in tissues and activate complement, which explains the low
complement levels during active disease. The inflammatory response to these
deposited complexes causes the multi-system manifestations characteristic of lupus
flares.
Q4: A 45-year-old patient who received a kidney transplant 6 months ago presents with
declining renal function, fever, and graft tenderness. Biopsy reveals dense lymphocytic
infiltration with interstitial edema. Which type of rejection is most consistent with these
findings?
A. Hyperacute rejection
B. Acute cellular rejection [CORRECT]
C. Acute antibody-mediated rejection
D. Chronic rejection
Correct Answer: B
Rationale: The best answer is B. Acute cellular rejection typically occurs weeks to
months after transplantation and is characterized by T-lymphocyte infiltration into the
graft parenchyma, causing interstitial edema and tubular injury. The presence of fever
and graft tenderness along with the histologic picture of lymphocytic infiltration fits this
pattern perfectly, as opposed to hyperacute rejection which occurs immediately or
chronic rejection which shows fibrosis and vascular changes.
, Q5: A 40-year-old patient with a strong family history of breast cancer tests positive for
a BRCA1 mutation. The APRN explains that this mutation increases cancer risk through
which mechanism?
A. Loss of tumor suppressor function impairing DNA repair [CORRECT]
B. Activation of proto-oncogenes leading to uncontrolled cell cycling
C. Overexpression of growth factor receptors
D. Defective apoptosis due to altered caspase activity
Correct Answer: A
Rationale: The best answer is A. BRCA1 and BRCA2 are tumor suppressor genes that
function in homologous recombination DNA repair. When mutated, the loss of this
repair function leads to genomic instability and increased susceptibility to breast,
ovarian, and other cancers. This is fundamentally different from oncogene activation,
which involves gain-of-function mutations in genes that promote cell growth.
Q6: A patient with small cell lung cancer develops serum sodium of 118 mEq/L, serum
osmolality of 250 mOsm/kg, urine osmolality of 450 mOsm/kg, and urine sodium of 65
mEq/L. Which pathophysiologic process best explains these findings?
A. Diabetes insipidus with impaired ADH secretion
B. Syndrome of inappropriate antidiuretic hormone (SIADH) [CORRECT]
C. Primary polydipsia with water intoxication
D. Hypervolemic hypernatremia from excessive sodium intake
Complete Accurate Questions – Well Elaborated Answers –
Correct Verified – Pass Guaranteed - A+ Graded
Part 1: Advanced Pathophysiology & Disease Mechanisms
Q1: A 58-year-old smoker with chronic bronchitis has areas of squamous metaplasia
identified on bronchial biopsy. The APRN recognizes that metaplasia in this setting
represents which type of cellular adaptation?
A. An irreversible change that always progresses to dysplasia
B. A reversible change in which one mature cell type is replaced by another mature cell
type [CORRECT]
C. An increase in cell number leading to tissue enlargement
D. A decrease in cell size due to reduced workload
Correct Answer: B
Rationale: The best answer is B. Metaplasia is defined as a reversible change where one
differentiated cell type is substituted by another differentiated cell type, often as an
adaptive response to chronic irritation. In the airways, chronic smoking irritation causes
columnar ciliated epithelium to transform into squamous epithelium. This is a
protective adaptation, though it can become dysplastic over time if the irritant persists.
,Q2: A patient presents with a swollen, erythematous, warm ankle following a penetrating
wound. Synovial fluid analysis shows numerous neutrophils. Which inflammatory
mediator is primarily responsible for the vasodilation and increased vascular
permeability seen in this acute response?
A. Interleukin-1 (IL-1)
B. Histamine and bradykinin [CORRECT]
C. Transforming growth factor-beta (TGF-β)
D. Interferon-gamma (IFN-γ)
Correct Answer: B
Rationale: The best answer is B. In acute inflammation, histamine released from mast
cells and basophils, along with bradykinin from the kinin system, are the primary
mediators causing vasodilation and increased vascular permeability. These are the early
responders that produce the classic signs of rubor and tumor, while IL-1 and IFN-γ are
more involved in later immune modulation and chronic responses.
Q3: A 35-year-old patient with systemic lupus erythematosus has elevated anti-dsDNA
antibodies and low complement levels during a disease flare. Which underlying
immunologic mechanism best explains this pattern?
A. Type I hypersensitivity mediated by IgE
B. Type II hypersensitivity with antibody-mediated cytotoxicity
C. Type III hypersensitivity with immune complex deposition [CORRECT]
D. Type IV hypersensitivity with T-cell mediated destruction
,Correct Answer: C
Rationale: The best answer is C. SLE is the prototype for type III hypersensitivity, where
autoantibodies form immune complexes with nuclear antigens like dsDNA. These
complexes deposit in tissues and activate complement, which explains the low
complement levels during active disease. The inflammatory response to these
deposited complexes causes the multi-system manifestations characteristic of lupus
flares.
Q4: A 45-year-old patient who received a kidney transplant 6 months ago presents with
declining renal function, fever, and graft tenderness. Biopsy reveals dense lymphocytic
infiltration with interstitial edema. Which type of rejection is most consistent with these
findings?
A. Hyperacute rejection
B. Acute cellular rejection [CORRECT]
C. Acute antibody-mediated rejection
D. Chronic rejection
Correct Answer: B
Rationale: The best answer is B. Acute cellular rejection typically occurs weeks to
months after transplantation and is characterized by T-lymphocyte infiltration into the
graft parenchyma, causing interstitial edema and tubular injury. The presence of fever
and graft tenderness along with the histologic picture of lymphocytic infiltration fits this
pattern perfectly, as opposed to hyperacute rejection which occurs immediately or
chronic rejection which shows fibrosis and vascular changes.
, Q5: A 40-year-old patient with a strong family history of breast cancer tests positive for
a BRCA1 mutation. The APRN explains that this mutation increases cancer risk through
which mechanism?
A. Loss of tumor suppressor function impairing DNA repair [CORRECT]
B. Activation of proto-oncogenes leading to uncontrolled cell cycling
C. Overexpression of growth factor receptors
D. Defective apoptosis due to altered caspase activity
Correct Answer: A
Rationale: The best answer is A. BRCA1 and BRCA2 are tumor suppressor genes that
function in homologous recombination DNA repair. When mutated, the loss of this
repair function leads to genomic instability and increased susceptibility to breast,
ovarian, and other cancers. This is fundamentally different from oncogene activation,
which involves gain-of-function mutations in genes that promote cell growth.
Q6: A patient with small cell lung cancer develops serum sodium of 118 mEq/L, serum
osmolality of 250 mOsm/kg, urine osmolality of 450 mOsm/kg, and urine sodium of 65
mEq/L. Which pathophysiologic process best explains these findings?
A. Diabetes insipidus with impaired ADH secretion
B. Syndrome of inappropriate antidiuretic hormone (SIADH) [CORRECT]
C. Primary polydipsia with water intoxication
D. Hypervolemic hypernatremia from excessive sodium intake
