SCI 225 FINAL EXAM (NIGHTINGALE) NEWEST 2026/
2027 ACTUAL EXAM TEST BANK| SCI 225
PATHOPHYSIOLOGY FINAL EXAM REVIEW WITH
COMPLETE 300 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ GRADED A+
A patient with type 1 diabetes has a blood glucose level of 320 mg/dL
and reports excessive thirst and urination. Which mechanism most
directly causes the increased urine output?
A. Increased secretion of aldosterone
B. Reduced filtration of glucose by the kidneys
C. Osmotic diuresis caused by glucose in the renal tubules
D. Increased renal retention of sodium without water - Correct Answer -
C. Osmotic diuresis caused by glucose in the renal tubules
When glucose exceeds the renal reabsorption capacity, glucose remains
in the tubular fluid and draws water into the urine, causing polyuria.
A patient with longstanding diabetes develops retinopathy and declining
kidney function. Laboratory findings suggest increased advanced
glycation end products (AGEs). Which mechanism contributes to these
complications?
A. Glycation-induced oxidative stress and tissue injury
B. Complete suppression of inflammatory signaling
C. Increased regeneration of damaged vascular endothelium
D. Reduced modification of extracellular proteins - Correct Answer - A.
Glycation-induced oxidative stress and tissue injury
pg. 1
,AGEs alter proteins and activate inflammatory and oxidative pathways,
contributing to vascular and tissue damage in chronic diabetes.
A patient with small-cell lung carcinoma develops confusion and
seizures. Laboratory testing reveals serum sodium of 119 mEq/L and
inappropriately concentrated urine. Which mechanism best explains
these findings?
A. Excessive renal sodium loss caused by aldosterone deficiency
B. Increased water excretion caused by reduced ADH activity
C. Increased sodium retention without water retention
D. Excessive ADH activity causing water retention and dilutional
hyponatremia - Correct Answer – D. Excessive ADH activity causing
water retention and dilutional hyponatremia
SIADH causes inappropriate water retention, diluting serum sodium and
producing hypotonic hyponatremia.
A newborn has recurrent severe infections, hypocalcemia, and a
congenital cardiac defect. Testing reveals thymic hypoplasia. Which
immune abnormality is most likely?
A. Excessive B-cell antibody production
B. Increased complement activation
C. Impaired T-lymphocyte development
D. Increased neutrophil oxidative activity - Correct Answer - C.
Impaired T-lymphocyte development
DiGeorge syndrome can cause thymic hypoplasia, resulting in reduced
T-cell development. Parathyroid abnormalities can also produce
hypocalcemia.
pg. 2
,A child develops recurrent infections with catalase-positive organisms.
Neutrophils ingest pathogens but have impaired production of reactive
oxygen species. Which disorder is most likely?
A. DiGeorge syndrome
B. Selective IgA deficiency
C. Severe combined immunodeficiency
D. Chronic granulomatous disease - Correct Answer - D. Chronic
granulomatous disease
A defect in NADPH oxidase impairs the neutrophil respiratory burst,
reducing the ability to kill certain pathogens after phagocytosis.
A patient develops enlarged hands, widening facial features, and
headaches. Imaging identifies a pituitary adenoma. Which hormonal
abnormality is most likely responsible?
A. Reduced secretion of antidiuretic hormone
B. Increased secretion of parathyroid hormone
C. Excessive growth hormone secretion
D. Reduced secretion of thyroid-stimulating hormone - Correct Answer
– C. Excessive growth hormone secretion
Acromegaly in adults usually results from excess growth hormone,
commonly due to a pituitary adenoma, leading to increased IGF-1 and
tissue overgrowth.
A 19-year-old patient presents with weight loss, polyuria, and elevated
blood glucose. Testing reveals positive pancreatic islet autoantibodies
and low C-peptide levels. Which mechanism best explains the disease?
A. Autoimmune destruction of pancreatic beta cells
B. Excessive hepatic glycogen storage
pg. 3
, C. Increased sensitivity of tissues to insulin
D. Excessive insulin production by pancreatic beta cells - Correct
Answer – A. Autoimmune destruction of pancreatic beta cells
Type 1 diabetes typically results from autoimmune beta-cell destruction,
causing severe insulin deficiency.
A patient has a firm, painless thyroid nodule discovered during a routine
examination. Which additional finding would most strongly increase
concern for thyroid malignancy?
A. A small, freely mobile nodule with no suspicious features
B. Symmetric thyroid enlargement during a viral illness
C. Mild thyroid tenderness with transient fever
D. A fixed nodule with suspicious cervical lymphadenopathy - Correct
Answer - D. A fixed nodule with suspicious cervical lymphadenopathy
A fixed thyroid nodule and suspicious cervical lymph nodes increase
concern for malignancy and warrant further evaluation.
A patient with a recent severe infection develops thrombocytopenia and
evidence of widespread coagulation activation. Which test is particularly
useful for identifying increased fibrin breakdown?
A. D-dimer
B. Serum albumin
C. Hemoglobin A1c
D. Thyroid-stimulating hormone - Correct Answer – A. D-dimer
D-dimer is produced when cross-linked fibrin is broken down and is
commonly elevated in DIC, although it is not specific to that condition.
pg. 4
2027 ACTUAL EXAM TEST BANK| SCI 225
PATHOPHYSIOLOGY FINAL EXAM REVIEW WITH
COMPLETE 300 REAL EXAM QUESTIONS AND
CORRECT VERIFIED ANSWERS/ GRADED A+
A patient with type 1 diabetes has a blood glucose level of 320 mg/dL
and reports excessive thirst and urination. Which mechanism most
directly causes the increased urine output?
A. Increased secretion of aldosterone
B. Reduced filtration of glucose by the kidneys
C. Osmotic diuresis caused by glucose in the renal tubules
D. Increased renal retention of sodium without water - Correct Answer -
C. Osmotic diuresis caused by glucose in the renal tubules
When glucose exceeds the renal reabsorption capacity, glucose remains
in the tubular fluid and draws water into the urine, causing polyuria.
A patient with longstanding diabetes develops retinopathy and declining
kidney function. Laboratory findings suggest increased advanced
glycation end products (AGEs). Which mechanism contributes to these
complications?
A. Glycation-induced oxidative stress and tissue injury
B. Complete suppression of inflammatory signaling
C. Increased regeneration of damaged vascular endothelium
D. Reduced modification of extracellular proteins - Correct Answer - A.
Glycation-induced oxidative stress and tissue injury
pg. 1
,AGEs alter proteins and activate inflammatory and oxidative pathways,
contributing to vascular and tissue damage in chronic diabetes.
A patient with small-cell lung carcinoma develops confusion and
seizures. Laboratory testing reveals serum sodium of 119 mEq/L and
inappropriately concentrated urine. Which mechanism best explains
these findings?
A. Excessive renal sodium loss caused by aldosterone deficiency
B. Increased water excretion caused by reduced ADH activity
C. Increased sodium retention without water retention
D. Excessive ADH activity causing water retention and dilutional
hyponatremia - Correct Answer – D. Excessive ADH activity causing
water retention and dilutional hyponatremia
SIADH causes inappropriate water retention, diluting serum sodium and
producing hypotonic hyponatremia.
A newborn has recurrent severe infections, hypocalcemia, and a
congenital cardiac defect. Testing reveals thymic hypoplasia. Which
immune abnormality is most likely?
A. Excessive B-cell antibody production
B. Increased complement activation
C. Impaired T-lymphocyte development
D. Increased neutrophil oxidative activity - Correct Answer - C.
Impaired T-lymphocyte development
DiGeorge syndrome can cause thymic hypoplasia, resulting in reduced
T-cell development. Parathyroid abnormalities can also produce
hypocalcemia.
pg. 2
,A child develops recurrent infections with catalase-positive organisms.
Neutrophils ingest pathogens but have impaired production of reactive
oxygen species. Which disorder is most likely?
A. DiGeorge syndrome
B. Selective IgA deficiency
C. Severe combined immunodeficiency
D. Chronic granulomatous disease - Correct Answer - D. Chronic
granulomatous disease
A defect in NADPH oxidase impairs the neutrophil respiratory burst,
reducing the ability to kill certain pathogens after phagocytosis.
A patient develops enlarged hands, widening facial features, and
headaches. Imaging identifies a pituitary adenoma. Which hormonal
abnormality is most likely responsible?
A. Reduced secretion of antidiuretic hormone
B. Increased secretion of parathyroid hormone
C. Excessive growth hormone secretion
D. Reduced secretion of thyroid-stimulating hormone - Correct Answer
– C. Excessive growth hormone secretion
Acromegaly in adults usually results from excess growth hormone,
commonly due to a pituitary adenoma, leading to increased IGF-1 and
tissue overgrowth.
A 19-year-old patient presents with weight loss, polyuria, and elevated
blood glucose. Testing reveals positive pancreatic islet autoantibodies
and low C-peptide levels. Which mechanism best explains the disease?
A. Autoimmune destruction of pancreatic beta cells
B. Excessive hepatic glycogen storage
pg. 3
, C. Increased sensitivity of tissues to insulin
D. Excessive insulin production by pancreatic beta cells - Correct
Answer – A. Autoimmune destruction of pancreatic beta cells
Type 1 diabetes typically results from autoimmune beta-cell destruction,
causing severe insulin deficiency.
A patient has a firm, painless thyroid nodule discovered during a routine
examination. Which additional finding would most strongly increase
concern for thyroid malignancy?
A. A small, freely mobile nodule with no suspicious features
B. Symmetric thyroid enlargement during a viral illness
C. Mild thyroid tenderness with transient fever
D. A fixed nodule with suspicious cervical lymphadenopathy - Correct
Answer - D. A fixed nodule with suspicious cervical lymphadenopathy
A fixed thyroid nodule and suspicious cervical lymph nodes increase
concern for malignancy and warrant further evaluation.
A patient with a recent severe infection develops thrombocytopenia and
evidence of widespread coagulation activation. Which test is particularly
useful for identifying increased fibrin breakdown?
A. D-dimer
B. Serum albumin
C. Hemoglobin A1c
D. Thyroid-stimulating hormone - Correct Answer – A. D-dimer
D-dimer is produced when cross-linked fibrin is broken down and is
commonly elevated in DIC, although it is not specific to that condition.
pg. 4
