NURS 6501 WEEK 11 QUIZ 3 SETS 2026/2027 | Advanced
Pathophysiology | 125 Questions & Answers | Scored 100%
| Latest | Walden University | Pass Guaranteed - A+ Graded
QUIZ SET 1: MULTISYSTEM & ENDOCRINE DISORDERS (Questions
1-40)
Question 1
The autoimmune destruction of pancreatic beta cells in Type 1 diabetes mellitus is
primarily mediated by which immunologic mechanism?
A. Neutrophil infiltration and abscess formation
B. T-cell-mediated destruction with autoantibody production
C. B-cell lymphoma involving the islets of Langerhans
D. Viral infection with direct beta cell lysis only
Correct Answer: B B. T-cell-mediated destruction with autoantibody production
[CORRECT] Rationale: Type 1 DM is a T-cell-mediated autoimmune disease where
CD4+ and CD8+ T-cells infiltrate pancreatic islets, leading to beta cell destruction.
Autoantibodies (GAD65, IA-2, ZnT8, insulin) serve as markers but are not the primary
destructive mechanism. Neutrophil abscesses (A) are not characteristic. B-cell
lymphoma (C) is neoplastic, not autoimmune. Viral infection (D) may trigger
autoimmunity but does not directly cause the disease. NURS 6501 emphasizes that
understanding the autoimmune pathophysiology is essential for predicting disease
course and complications.
Question 2
,Which genetic markers are most strongly associated with susceptibility to Type 1
diabetes mellitus?
A. HLA-B27
B. HLA-DR3 and HLA-DR4
C. HLA-DQ2 and HLA-DQ8
D. HLA-A1 and HLA-B8
Correct Answer: B B. HLA-DR3 and HLA-DR4 [CORRECT] Rationale: HLA-DR3 and
HLA-DR4 alleles confer the strongest genetic susceptibility to Type 1 DM, particularly
when inherited together (DR3/DR4 heterozygotes have the highest risk). HLA-B27 (A)
is associated with ankylosing spondylitis. HLA-DQ2/DQ8 (C) are celiac disease markers.
HLA-A1/B8 (D) are non-specific haplotypes. NURS 6501 emphasizes that genetic
predisposition interacts with environmental triggers to initiate autoimmune beta cell
destruction.
Question 3
A patient with Type 1 diabetes presents with polyuria, polydipsia, fruity breath,
Kussmaul respirations, and a glucose of 520 mg/dL. Arterial blood gas reveals pH 7.18,
HCO3 12 mEq/L, and anion gap 20. The pathophysiological basis of the anion gap
metabolic acidosis is:
A. Excessive renal bicarbonate excretion
B. Accumulation of ketoacids from uncontrolled lipolysis and ketogenesis
C. Hyperventilation-induced respiratory alkalosis
D. Lactic acidosis from tissue hypoperfusion
Correct Answer: B B. Accumulation of ketoacids from uncontrolled lipolysis and
ketogenesis [CORRECT] Rationale: Absolute insulin deficiency in DKA activates
hormone-sensitive lipase, causing uncontrolled lipolysis and free fatty acid release.
Hepatic ketogenesis produces beta-hydroxybutyrate and acetoacetate—unmeasured
anions that consume bicarbonate and create anion gap metabolic acidosis. Renal
bicarbonate loss (A) is secondary, not primary. Kussmaul respirations (C) are
compensatory, not causative. Lactic acidosis (D) may coexist but is not the primary
,mechanism. NURS 6501 emphasizes that DKA represents a failure of insulin's anabolic
and anti-lipolytic functions.
Question 4
In DKA, which electrolyte abnormality is most critical to assess and correct before
initiating insulin therapy?
A. Hypernatremia
B. Hypokalemia
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B B. Hypokalemia [CORRECT] Rationale: Insulin drives potassium
intracellularly via stimulation of the Na+/K+-ATPase pump. If potassium is <3.3 mEq/L
before insulin administration, fatal arrhythmias may occur. DKA patients often present
with normal or elevated serum potassium due to acidosis and insulin deficiency, but
total body potassium is depleted. Hypernatremia (A) and hypomagnesemia (D) require
correction but are not immediately life-threatening. Hypercalcemia (C) is not
characteristic of DKA. NURS 6501 emphasizes that potassium assessment is the critical
safety check before insulin therapy.
Question 5
Which adipokine is decreased in obesity and is protective against insulin resistance and
Type 2 diabetes?
A. Leptin
B. Resistin
C. Adiponectin
D. TNF-alpha
Correct Answer: C C. Adiponectin [CORRECT] Rationale: Adiponectin enhances
insulin sensitivity, promotes fatty acid oxidation, and has anti-inflammatory properties.
, Levels decrease with increasing adiposity, contributing to insulin resistance. Leptin (A)
increases with obesity but is often ineffective due to leptin resistance. Resistin (B) and
TNF-alpha (D) promote insulin resistance and inflammation. NURS 6501 emphasizes
that adipokine dysregulation in visceral obesity creates a proinflammatory,
prothrombotic environment driving metabolic syndrome.
Question 6
The pathophysiology of Type 2 diabetes mellitus is characterized by:
A. Absolute insulin deficiency with autoimmune destruction of beta cells
B. Insulin resistance with progressive beta cell dysfunction and relative insulin
deficiency
C. Excessive glucagon suppression leading to hypoglycemia
D. Complete absence of insulin receptors on target tissues
Correct Answer: B B. Insulin resistance with progressive beta cell dysfunction and
relative insulin deficiency [CORRECT] Rationale: Type 2 DM begins with insulin
resistance in muscle, liver, and adipose tissue, compensated initially by
hyperinsulinemia. Over time, glucotoxicity and lipotoxicity cause progressive beta cell
dysfunction and relative (not absolute) insulin deficiency. Absolute deficiency (A)
defines Type 1. Glucagon suppression (C) is opposite of the actual pathophysiology
(hyperglucagonemia occurs). Complete receptor absence (D) describes rare genetic
syndromes, not typical Type 2. NURS 6501 emphasizes the progressive nature of beta
cell failure in Type 2 DM.
Question 7
A 45-year-old obese male has hypertension (142/88), fasting glucose 108 mg/dL,
triglycerides 220 mg/dL, HDL 32 mg/dL, and waist circumference 42 inches. These
findings meet criteria for:
A. Metabolic syndrome
B. Cushing's syndrome
Pathophysiology | 125 Questions & Answers | Scored 100%
| Latest | Walden University | Pass Guaranteed - A+ Graded
QUIZ SET 1: MULTISYSTEM & ENDOCRINE DISORDERS (Questions
1-40)
Question 1
The autoimmune destruction of pancreatic beta cells in Type 1 diabetes mellitus is
primarily mediated by which immunologic mechanism?
A. Neutrophil infiltration and abscess formation
B. T-cell-mediated destruction with autoantibody production
C. B-cell lymphoma involving the islets of Langerhans
D. Viral infection with direct beta cell lysis only
Correct Answer: B B. T-cell-mediated destruction with autoantibody production
[CORRECT] Rationale: Type 1 DM is a T-cell-mediated autoimmune disease where
CD4+ and CD8+ T-cells infiltrate pancreatic islets, leading to beta cell destruction.
Autoantibodies (GAD65, IA-2, ZnT8, insulin) serve as markers but are not the primary
destructive mechanism. Neutrophil abscesses (A) are not characteristic. B-cell
lymphoma (C) is neoplastic, not autoimmune. Viral infection (D) may trigger
autoimmunity but does not directly cause the disease. NURS 6501 emphasizes that
understanding the autoimmune pathophysiology is essential for predicting disease
course and complications.
Question 2
,Which genetic markers are most strongly associated with susceptibility to Type 1
diabetes mellitus?
A. HLA-B27
B. HLA-DR3 and HLA-DR4
C. HLA-DQ2 and HLA-DQ8
D. HLA-A1 and HLA-B8
Correct Answer: B B. HLA-DR3 and HLA-DR4 [CORRECT] Rationale: HLA-DR3 and
HLA-DR4 alleles confer the strongest genetic susceptibility to Type 1 DM, particularly
when inherited together (DR3/DR4 heterozygotes have the highest risk). HLA-B27 (A)
is associated with ankylosing spondylitis. HLA-DQ2/DQ8 (C) are celiac disease markers.
HLA-A1/B8 (D) are non-specific haplotypes. NURS 6501 emphasizes that genetic
predisposition interacts with environmental triggers to initiate autoimmune beta cell
destruction.
Question 3
A patient with Type 1 diabetes presents with polyuria, polydipsia, fruity breath,
Kussmaul respirations, and a glucose of 520 mg/dL. Arterial blood gas reveals pH 7.18,
HCO3 12 mEq/L, and anion gap 20. The pathophysiological basis of the anion gap
metabolic acidosis is:
A. Excessive renal bicarbonate excretion
B. Accumulation of ketoacids from uncontrolled lipolysis and ketogenesis
C. Hyperventilation-induced respiratory alkalosis
D. Lactic acidosis from tissue hypoperfusion
Correct Answer: B B. Accumulation of ketoacids from uncontrolled lipolysis and
ketogenesis [CORRECT] Rationale: Absolute insulin deficiency in DKA activates
hormone-sensitive lipase, causing uncontrolled lipolysis and free fatty acid release.
Hepatic ketogenesis produces beta-hydroxybutyrate and acetoacetate—unmeasured
anions that consume bicarbonate and create anion gap metabolic acidosis. Renal
bicarbonate loss (A) is secondary, not primary. Kussmaul respirations (C) are
compensatory, not causative. Lactic acidosis (D) may coexist but is not the primary
,mechanism. NURS 6501 emphasizes that DKA represents a failure of insulin's anabolic
and anti-lipolytic functions.
Question 4
In DKA, which electrolyte abnormality is most critical to assess and correct before
initiating insulin therapy?
A. Hypernatremia
B. Hypokalemia
C. Hypercalcemia
D. Hypomagnesemia
Correct Answer: B B. Hypokalemia [CORRECT] Rationale: Insulin drives potassium
intracellularly via stimulation of the Na+/K+-ATPase pump. If potassium is <3.3 mEq/L
before insulin administration, fatal arrhythmias may occur. DKA patients often present
with normal or elevated serum potassium due to acidosis and insulin deficiency, but
total body potassium is depleted. Hypernatremia (A) and hypomagnesemia (D) require
correction but are not immediately life-threatening. Hypercalcemia (C) is not
characteristic of DKA. NURS 6501 emphasizes that potassium assessment is the critical
safety check before insulin therapy.
Question 5
Which adipokine is decreased in obesity and is protective against insulin resistance and
Type 2 diabetes?
A. Leptin
B. Resistin
C. Adiponectin
D. TNF-alpha
Correct Answer: C C. Adiponectin [CORRECT] Rationale: Adiponectin enhances
insulin sensitivity, promotes fatty acid oxidation, and has anti-inflammatory properties.
, Levels decrease with increasing adiposity, contributing to insulin resistance. Leptin (A)
increases with obesity but is often ineffective due to leptin resistance. Resistin (B) and
TNF-alpha (D) promote insulin resistance and inflammation. NURS 6501 emphasizes
that adipokine dysregulation in visceral obesity creates a proinflammatory,
prothrombotic environment driving metabolic syndrome.
Question 6
The pathophysiology of Type 2 diabetes mellitus is characterized by:
A. Absolute insulin deficiency with autoimmune destruction of beta cells
B. Insulin resistance with progressive beta cell dysfunction and relative insulin
deficiency
C. Excessive glucagon suppression leading to hypoglycemia
D. Complete absence of insulin receptors on target tissues
Correct Answer: B B. Insulin resistance with progressive beta cell dysfunction and
relative insulin deficiency [CORRECT] Rationale: Type 2 DM begins with insulin
resistance in muscle, liver, and adipose tissue, compensated initially by
hyperinsulinemia. Over time, glucotoxicity and lipotoxicity cause progressive beta cell
dysfunction and relative (not absolute) insulin deficiency. Absolute deficiency (A)
defines Type 1. Glucagon suppression (C) is opposite of the actual pathophysiology
(hyperglucagonemia occurs). Complete receptor absence (D) describes rare genetic
syndromes, not typical Type 2. NURS 6501 emphasizes the progressive nature of beta
cell failure in Type 2 DM.
Question 7
A 45-year-old obese male has hypertension (142/88), fasting glucose 108 mg/dL,
triglycerides 220 mg/dL, HDL 32 mg/dL, and waist circumference 42 inches. These
findings meet criteria for:
A. Metabolic syndrome
B. Cushing's syndrome
