NUR 5461 MODULE 5 EXAM ADVANCED PATHOPHYSIOLOGY ACTUAL
EXAM 2026/2027 PRACTICE QUESTIONS (MOST TESTED QUESTIONS
FROM PAST EXAMS) & A NEW UPDATED STUDY GUIDE ALL
COMPLETE ACCURATE EXAM APPROVED QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (100% CORRECT VERIFIED
ANSWERS SOLUTIONS) NEWEST UPDATED VERSION 2026 EDITION
|GUARANTEED SUCCESS A+ (BRAND NEW!) |INSTANT PDF
A 58-year-old with type 2 diabetes presents with fasting glucose of 182 mg/dL and
HbA1c of 8.9%. Which pathophysiological mechanism is primarily responsible for
the elevated HbA1c?
A) Increased renal glucose reabsorption via SGLT2
B) Non-enzymatic glycosylation of hemoglobin
C) Enhanced hepatic gluconeogenesis due to glucagon excess
D) Peripheral insulin resistance in adipose tissue
B) Non-enzymatic glycosylation of hemoglobin CORRECT ANSWER
Rationale: HbA1c reflects chronic glucose levels because glucose irreversibly
binds to hemoglobin via non-enzymatic glycosylation (glycation). Renal SGLT2
activity, gluconeogenesis, and insulin resistance contribute to hyperglycemia but
do not directly measure HbA1c elevation.
In diabetic ketoacidosis (DKA), which compensatory mechanism is most critical
for preventing a fatal drop in pH?
A) Increased respiratory rate to lower PaCO₂
B) Renal excretion of ammonium chloride
C) Buffering of hydrogen ions by intracellular proteins
D) Hepatic ketone body utilization
A) Increased respiratory rate to lower PaCO₂ CORRECT ANSWER
,Rationale: Respiratory compensation via Kussmaul breathing rapidly reduces
PaCO₂, partially offsetting metabolic acidosis. Renal compensation is slower
(hours to days), while intracellular buffering is limited.
A patient with hyperosmolar hyperglycemic state (HHS) has serum glucose 680
mg/dL, sodium 148 mEq/L, and osmolality 325 mOsm/kg. Why is ketosis minimal
in HHS compared to DKA?
A) Higher insulin levels suppress lipolysis
B) Severe dehydration prevents ketogenesis
C) Residual insulin action inhibits hormone-sensitive lipase
D) Counter-regulatory hormones are not elevated
C) Residual insulin action inhibits hormone-sensitive lipase CORRECT ANSWER
Rationale: In HHS, sufficient insulin remains to suppress lipolysis and ketogenesis
but not to prevent hyperglycemia. DKA has near-absolute insulin deficiency.
A 45-year-old with hypothyroidism develops myxedema coma. Which
cardiovascular finding is expected?
A) Tachycardia with widened pulse pressure
B) Hypotension and bradycardia
C) Hypertension with bounding pulses
D) Orthostatic hypotension without heart rate change
B) Hypotension and bradycardia CORRECT ANSWER
Rationale: Myxedema coma causes decreased cardiac output, bradycardia, and
hypotension due to reduced thyroid hormone effects on beta-adrenergic receptors
and myocardial contractility.
A patient with Cushing syndrome exhibits purple striae, moon facies, and proximal
muscle weakness. The underlying pathophysiology most directly causing the
muscle weakness is:
,A) Cortisol-induced protein catabolism in skeletal muscle
B) Mineralocorticoid-mediated potassium wasting
C) Androgen excess leading to myopathy
D) Glucocorticoid suppression of ACTH
A) Cortisol-induced protein catabolism in skeletal muscle CORRECT ANSWER
Rationale: Excess glucocorticoids promote proteolysis and inhibit amino acid
uptake, leading to muscle wasting and weakness. Hypokalemia can cause
weakness but is less direct than protein catabolism.
Primary adrenal insufficiency (Addison disease) differs from secondary adrenal
insufficiency in that primary disease typically presents with:
A) Hyperpigmentation due to elevated ACTH
B) Isolated cortisol deficiency without mineralocorticoid loss
C) Low ACTH with normal aldosterone
D) Rapid onset of obesity and hypertension
A) Hyperpigmentation due to elevated ACTH CORRECT ANSWER
Rationale: In primary adrenal insufficiency, loss of cortisol feedback increases
ACTH, which shares precursor pro-opiomelanocortin with melanocyte-stimulating
hormone, causing hyperpigmentation.
A 32-year-old woman with amenorrhea, galactorrhea, and bitemporal hemianopsia
is found to have a prolactin-secreting pituitary adenoma. The visual field defect
results from compression of:
A) Optic chiasm
B) Optic nerve
C) Optic tract
D) Lateral geniculate body
A) Optic chiasm CORRECT ANSWER
, Rationale: Pituitary macroadenomas compress the optic chiasm from below,
causing bitemporal hemianopia due to damage to crossing nasal retinal fibers.
In syndrome of inappropriate antidiuretic hormone (SIADH), which laboratory
profile is most consistent?
A) Hyponatremia, low serum osmolality, high urine osmolality
B) Hyponatremia, high serum osmolality, low urine osmolality
C) Hypernatremia, low serum osmolality, high urine sodium
D) Hypernatremia, high serum osmolality, low urine sodium
A) Hyponatremia, low serum osmolality, high urine osmolality CORRECT
ANSWER
Rationale: SIADH causes water retention with dilutional hyponatremia and low
plasma osmolality; urine osmolality is inappropriately concentrated (>100
mOsm/kg).
A patient with long-standing type 1 diabetes develops atonic bladder,
gastroparesis, and orthostatic hypotension. These manifestations are best explained
by:
A) Somatic peripheral neuropathy
B) Autonomic neuropathy
C) Mononeuropathy multiplex
D) Radiculoplexopathy
B) Autonomic neuropathy CORRECT ANSWER
Rationale: Autonomic neuropathy affects parasympathetic (gastroparesis, atonic
bladder) and sympathetic (orthostatic hypotension) fibers. Somatic neuropathy
causes sensory/motor deficits, not visceral dysfunction.
Which hormone pair is directly involved in the counter-regulatory response to
hypoglycemia?
EXAM 2026/2027 PRACTICE QUESTIONS (MOST TESTED QUESTIONS
FROM PAST EXAMS) & A NEW UPDATED STUDY GUIDE ALL
COMPLETE ACCURATE EXAM APPROVED QUESTIONS AND CORRECT
DETAILED ANSWERS WITH RATIONALES (100% CORRECT VERIFIED
ANSWERS SOLUTIONS) NEWEST UPDATED VERSION 2026 EDITION
|GUARANTEED SUCCESS A+ (BRAND NEW!) |INSTANT PDF
A 58-year-old with type 2 diabetes presents with fasting glucose of 182 mg/dL and
HbA1c of 8.9%. Which pathophysiological mechanism is primarily responsible for
the elevated HbA1c?
A) Increased renal glucose reabsorption via SGLT2
B) Non-enzymatic glycosylation of hemoglobin
C) Enhanced hepatic gluconeogenesis due to glucagon excess
D) Peripheral insulin resistance in adipose tissue
B) Non-enzymatic glycosylation of hemoglobin CORRECT ANSWER
Rationale: HbA1c reflects chronic glucose levels because glucose irreversibly
binds to hemoglobin via non-enzymatic glycosylation (glycation). Renal SGLT2
activity, gluconeogenesis, and insulin resistance contribute to hyperglycemia but
do not directly measure HbA1c elevation.
In diabetic ketoacidosis (DKA), which compensatory mechanism is most critical
for preventing a fatal drop in pH?
A) Increased respiratory rate to lower PaCO₂
B) Renal excretion of ammonium chloride
C) Buffering of hydrogen ions by intracellular proteins
D) Hepatic ketone body utilization
A) Increased respiratory rate to lower PaCO₂ CORRECT ANSWER
,Rationale: Respiratory compensation via Kussmaul breathing rapidly reduces
PaCO₂, partially offsetting metabolic acidosis. Renal compensation is slower
(hours to days), while intracellular buffering is limited.
A patient with hyperosmolar hyperglycemic state (HHS) has serum glucose 680
mg/dL, sodium 148 mEq/L, and osmolality 325 mOsm/kg. Why is ketosis minimal
in HHS compared to DKA?
A) Higher insulin levels suppress lipolysis
B) Severe dehydration prevents ketogenesis
C) Residual insulin action inhibits hormone-sensitive lipase
D) Counter-regulatory hormones are not elevated
C) Residual insulin action inhibits hormone-sensitive lipase CORRECT ANSWER
Rationale: In HHS, sufficient insulin remains to suppress lipolysis and ketogenesis
but not to prevent hyperglycemia. DKA has near-absolute insulin deficiency.
A 45-year-old with hypothyroidism develops myxedema coma. Which
cardiovascular finding is expected?
A) Tachycardia with widened pulse pressure
B) Hypotension and bradycardia
C) Hypertension with bounding pulses
D) Orthostatic hypotension without heart rate change
B) Hypotension and bradycardia CORRECT ANSWER
Rationale: Myxedema coma causes decreased cardiac output, bradycardia, and
hypotension due to reduced thyroid hormone effects on beta-adrenergic receptors
and myocardial contractility.
A patient with Cushing syndrome exhibits purple striae, moon facies, and proximal
muscle weakness. The underlying pathophysiology most directly causing the
muscle weakness is:
,A) Cortisol-induced protein catabolism in skeletal muscle
B) Mineralocorticoid-mediated potassium wasting
C) Androgen excess leading to myopathy
D) Glucocorticoid suppression of ACTH
A) Cortisol-induced protein catabolism in skeletal muscle CORRECT ANSWER
Rationale: Excess glucocorticoids promote proteolysis and inhibit amino acid
uptake, leading to muscle wasting and weakness. Hypokalemia can cause
weakness but is less direct than protein catabolism.
Primary adrenal insufficiency (Addison disease) differs from secondary adrenal
insufficiency in that primary disease typically presents with:
A) Hyperpigmentation due to elevated ACTH
B) Isolated cortisol deficiency without mineralocorticoid loss
C) Low ACTH with normal aldosterone
D) Rapid onset of obesity and hypertension
A) Hyperpigmentation due to elevated ACTH CORRECT ANSWER
Rationale: In primary adrenal insufficiency, loss of cortisol feedback increases
ACTH, which shares precursor pro-opiomelanocortin with melanocyte-stimulating
hormone, causing hyperpigmentation.
A 32-year-old woman with amenorrhea, galactorrhea, and bitemporal hemianopsia
is found to have a prolactin-secreting pituitary adenoma. The visual field defect
results from compression of:
A) Optic chiasm
B) Optic nerve
C) Optic tract
D) Lateral geniculate body
A) Optic chiasm CORRECT ANSWER
, Rationale: Pituitary macroadenomas compress the optic chiasm from below,
causing bitemporal hemianopia due to damage to crossing nasal retinal fibers.
In syndrome of inappropriate antidiuretic hormone (SIADH), which laboratory
profile is most consistent?
A) Hyponatremia, low serum osmolality, high urine osmolality
B) Hyponatremia, high serum osmolality, low urine osmolality
C) Hypernatremia, low serum osmolality, high urine sodium
D) Hypernatremia, high serum osmolality, low urine sodium
A) Hyponatremia, low serum osmolality, high urine osmolality CORRECT
ANSWER
Rationale: SIADH causes water retention with dilutional hyponatremia and low
plasma osmolality; urine osmolality is inappropriately concentrated (>100
mOsm/kg).
A patient with long-standing type 1 diabetes develops atonic bladder,
gastroparesis, and orthostatic hypotension. These manifestations are best explained
by:
A) Somatic peripheral neuropathy
B) Autonomic neuropathy
C) Mononeuropathy multiplex
D) Radiculoplexopathy
B) Autonomic neuropathy CORRECT ANSWER
Rationale: Autonomic neuropathy affects parasympathetic (gastroparesis, atonic
bladder) and sympathetic (orthostatic hypotension) fibers. Somatic neuropathy
causes sensory/motor deficits, not visceral dysfunction.
Which hormone pair is directly involved in the counter-regulatory response to
hypoglycemia?
