STU DY E D ITIO N
N U R S I N G · PAT H O P H YS I O L O G Y · O R I G I N A L S T U D Y A S S ES S M EN T
Pathophysiology — Final Exam Review & Study
Guide
Review Cycle · Original Study Assessment with Full Rationales
6 0 Q UES T I O N S FUL L R AT I O N AL ES AN S WER KEY
60
Q UES T IO NS
6
S ECT IO NS
100%
R AT I O N A L E S
W HAT THI S C OV E R S
01 Cellular Biology, Fluids, and Electrolytes
02 Genetics, Immunity, and Inflammation
03 Cardiovascular and Hematologic Alterations
04 Respiratory and Renal Alterations
05 Neurologic, Endocrine, and Gastrointestinal Alterations
06 Musculoskeletal, Integumentary, and Neoplastic Disease
A BO UT THI S A SSE SSM E N T
This assessment is an original study aid containing 60 newly written multiple-choice questions with complete
rationales for every answer choice. It is designed for self-paced review of core course concepts at the application
and analysis level.
It is independent review material: it is not affiliated with, endorsed by, or sourced from any school, publisher, or
certifying body, and it does not contain and does not claim to contain any actual, secured, or proctored
examination content. Use it alongside your own course materials to test your understanding.
PA S S I N G S C O R E LEVEL F O R M AT
75% (45 of 60) UNDERGRADUATE NURSING MULTIPLE CHOICE (A–D)
O R I G I N A L S T U D Y EX A M Page 1
, Pathophysiology — Final Exam Review & Study Guide
60 multiple-choice questions · 6 sections · Full rationales included · Answer key appears at the end of this document
SECTION 01 · Cellular Biology, Fluids, and Electrolytes
Q1. A 71-year-old woman with chronic kidney disease presents with muscle weakness and palpitations
after using a salt substitute at home. Her serum potassium is 7.1 mEq/L, and the monitor shows tall,
peaked T waves with widening of the QRS complex. Which sequence best explains her cardiac
findings?
A. Hypokalemia hyperpolarizing the resting membrane and delaying repolarization
B. Hyperkalemia partially depolarizing the resting membrane potential and speeding
repolarization, producing peaked T waves and conduction slowing
C. Hypercalcemia shortening the plateau phase of the action potential
D. Hypermagnesemia blocking neuromuscular transmission
Correct Answer: A
Rationale: Extracellular potassium elevation reduces the resting membrane potential toward threshold,
inactivating sodium channels and accelerating early repolarization, which yields the tall peaked T waves and QRS
widening seen on the monitor. Hypokalemia flattens T waves, and calcium and magnesium disorders produce
different patterns.
Q2. A 23-year-old anxious backpacker at high altitude begins breathing rapidly and deeply. Arterial
blood gases show pH 7.51, PaCO2 of 29 mmHg, and normal bicarbonate. He reports tingling around his
mouth and cramping in his hands. Which acid-base disturbance is present?
A. Metabolic acidosis with respiratory compensation
B. Metabolic alkalosis from diuretic use
C. Respiratory alkalosis from hyperventilation with low PaCO2
D. Respiratory acidosis from hypoventilation
Correct Answer: C
Rationale: Elevated pH with a low PaCO2 and near-normal bicarbonate identifies primary respiratory alkalosis,
caused here by altitude- and anxiety-driven hyperventilation that blows off carbon dioxide. The perioral tingling
and hand cramping reflect the reduced ionized calcium that accompanies alkalemia, not a primary metabolic
process.
ORIGINAL STUDY EXAM Page 2
, Q3. A 58-year-old man with advanced cirrhosis develops progressive abdominal girth enlargement and
bilateral ankle swelling. His serum albumin is 1.9 g/dL, and physical examination shows shifting
dullness with pitting edema. Which mechanism primarily drives his fluid accumulation?
A. Increased capillary hydrostatic pressure from renal sodium retention alone
B. Lymphatic obstruction blocking interstitial fluid return
C. Decreased plasma oncotic pressure from hypoalbuminemia, allowing fluid to leak into the
interstitium and peritoneal cavity
D. Increased capillary permeability from systemic inflammation
Correct Answer: C
Rationale: The diseased liver cannot synthesize adequate albumin, so intravascular oncotic pressure falls and
fluid exits capillaries into tissues and the peritoneal space, producing edema and ascites. Portal hypertension
compounds the problem, but the profound hypoalbuminemia is the dominant mechanism in this presentation.
Q4. During a lecture, a student asks why cells dying after ischemic injury trigger intense inflammation,
while cells dying during normal embryonic sculpting do not. Which distinction answers her question?
A. Ischemic cell death is apoptosis, which releases lysosomal enzymes
B. Embryonic cell death is necrosis, which is contained silently
C. Necrosis is energy-dependent and carefully packaged
D. Ischemic injury causes necrosis with membrane rupture and spillage of contents, whereas
apoptosis packages the cell into fragments that are quietly phagocytosed
Correct Answer: D
Rationale: Necrosis from ischemia ruptures plasma membranes and releases intracellular contents, provoking
inflammation, while apoptosis is an energy-dependent program that fragments the cell into membrane-bound
bodies cleared without inflammation. The question hinges on exactly this contrast.
Q5. A 19-year-old woman with type 1 diabetes presents after missing insulin doses for two days with
deep, rapid sighing respirations, fruity breath, abdominal pain, and a glucose of 540 mg/dL. Blood gas
shows pH 7.09 and bicarbonate of 9 mEq/L. Which process best explains her breathing pattern?
A. Primary respiratory acidosis from fatigue
B. Compensatory respiratory alkalosis from anxiety
C. Pulmonary embolism causing reflex tachypnea
D. Kussmaul respirations compensating for metabolic acidosis by blowing off carbon dioxide
Correct Answer: D
Rationale: Diabetic ketoacidosis produces high-anion-gap metabolic acidosis, and the medullary respiratory
center responds with deep rapid Kussmaul breathing to eliminate carbon dioxide and raise pH toward normal. The
fruity acetone breath and severe ketoacidosis confirm the primary metabolic derangement.
ORIGINAL STUDY EXAM Page 3
N U R S I N G · PAT H O P H YS I O L O G Y · O R I G I N A L S T U D Y A S S ES S M EN T
Pathophysiology — Final Exam Review & Study
Guide
Review Cycle · Original Study Assessment with Full Rationales
6 0 Q UES T I O N S FUL L R AT I O N AL ES AN S WER KEY
60
Q UES T IO NS
6
S ECT IO NS
100%
R AT I O N A L E S
W HAT THI S C OV E R S
01 Cellular Biology, Fluids, and Electrolytes
02 Genetics, Immunity, and Inflammation
03 Cardiovascular and Hematologic Alterations
04 Respiratory and Renal Alterations
05 Neurologic, Endocrine, and Gastrointestinal Alterations
06 Musculoskeletal, Integumentary, and Neoplastic Disease
A BO UT THI S A SSE SSM E N T
This assessment is an original study aid containing 60 newly written multiple-choice questions with complete
rationales for every answer choice. It is designed for self-paced review of core course concepts at the application
and analysis level.
It is independent review material: it is not affiliated with, endorsed by, or sourced from any school, publisher, or
certifying body, and it does not contain and does not claim to contain any actual, secured, or proctored
examination content. Use it alongside your own course materials to test your understanding.
PA S S I N G S C O R E LEVEL F O R M AT
75% (45 of 60) UNDERGRADUATE NURSING MULTIPLE CHOICE (A–D)
O R I G I N A L S T U D Y EX A M Page 1
, Pathophysiology — Final Exam Review & Study Guide
60 multiple-choice questions · 6 sections · Full rationales included · Answer key appears at the end of this document
SECTION 01 · Cellular Biology, Fluids, and Electrolytes
Q1. A 71-year-old woman with chronic kidney disease presents with muscle weakness and palpitations
after using a salt substitute at home. Her serum potassium is 7.1 mEq/L, and the monitor shows tall,
peaked T waves with widening of the QRS complex. Which sequence best explains her cardiac
findings?
A. Hypokalemia hyperpolarizing the resting membrane and delaying repolarization
B. Hyperkalemia partially depolarizing the resting membrane potential and speeding
repolarization, producing peaked T waves and conduction slowing
C. Hypercalcemia shortening the plateau phase of the action potential
D. Hypermagnesemia blocking neuromuscular transmission
Correct Answer: A
Rationale: Extracellular potassium elevation reduces the resting membrane potential toward threshold,
inactivating sodium channels and accelerating early repolarization, which yields the tall peaked T waves and QRS
widening seen on the monitor. Hypokalemia flattens T waves, and calcium and magnesium disorders produce
different patterns.
Q2. A 23-year-old anxious backpacker at high altitude begins breathing rapidly and deeply. Arterial
blood gases show pH 7.51, PaCO2 of 29 mmHg, and normal bicarbonate. He reports tingling around his
mouth and cramping in his hands. Which acid-base disturbance is present?
A. Metabolic acidosis with respiratory compensation
B. Metabolic alkalosis from diuretic use
C. Respiratory alkalosis from hyperventilation with low PaCO2
D. Respiratory acidosis from hypoventilation
Correct Answer: C
Rationale: Elevated pH with a low PaCO2 and near-normal bicarbonate identifies primary respiratory alkalosis,
caused here by altitude- and anxiety-driven hyperventilation that blows off carbon dioxide. The perioral tingling
and hand cramping reflect the reduced ionized calcium that accompanies alkalemia, not a primary metabolic
process.
ORIGINAL STUDY EXAM Page 2
, Q3. A 58-year-old man with advanced cirrhosis develops progressive abdominal girth enlargement and
bilateral ankle swelling. His serum albumin is 1.9 g/dL, and physical examination shows shifting
dullness with pitting edema. Which mechanism primarily drives his fluid accumulation?
A. Increased capillary hydrostatic pressure from renal sodium retention alone
B. Lymphatic obstruction blocking interstitial fluid return
C. Decreased plasma oncotic pressure from hypoalbuminemia, allowing fluid to leak into the
interstitium and peritoneal cavity
D. Increased capillary permeability from systemic inflammation
Correct Answer: C
Rationale: The diseased liver cannot synthesize adequate albumin, so intravascular oncotic pressure falls and
fluid exits capillaries into tissues and the peritoneal space, producing edema and ascites. Portal hypertension
compounds the problem, but the profound hypoalbuminemia is the dominant mechanism in this presentation.
Q4. During a lecture, a student asks why cells dying after ischemic injury trigger intense inflammation,
while cells dying during normal embryonic sculpting do not. Which distinction answers her question?
A. Ischemic cell death is apoptosis, which releases lysosomal enzymes
B. Embryonic cell death is necrosis, which is contained silently
C. Necrosis is energy-dependent and carefully packaged
D. Ischemic injury causes necrosis with membrane rupture and spillage of contents, whereas
apoptosis packages the cell into fragments that are quietly phagocytosed
Correct Answer: D
Rationale: Necrosis from ischemia ruptures plasma membranes and releases intracellular contents, provoking
inflammation, while apoptosis is an energy-dependent program that fragments the cell into membrane-bound
bodies cleared without inflammation. The question hinges on exactly this contrast.
Q5. A 19-year-old woman with type 1 diabetes presents after missing insulin doses for two days with
deep, rapid sighing respirations, fruity breath, abdominal pain, and a glucose of 540 mg/dL. Blood gas
shows pH 7.09 and bicarbonate of 9 mEq/L. Which process best explains her breathing pattern?
A. Primary respiratory acidosis from fatigue
B. Compensatory respiratory alkalosis from anxiety
C. Pulmonary embolism causing reflex tachypnea
D. Kussmaul respirations compensating for metabolic acidosis by blowing off carbon dioxide
Correct Answer: D
Rationale: Diabetic ketoacidosis produces high-anion-gap metabolic acidosis, and the medullary respiratory
center responds with deep rapid Kussmaul breathing to eliminate carbon dioxide and raise pH toward normal. The
fruity acetone breath and severe ketoacidosis confirm the primary metabolic derangement.
ORIGINAL STUDY EXAM Page 3
