NR 507 Week 5: Endocrine, Renal, and Gastrointestinal
Pathophysiology 2026 Chamberlain College
1. Which of the following is the primary pathophysiological mechanism behind
Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Hypersecretion of glucagon by alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Excessive glucose production by the liver
Answer: C
Rationale: Type 1 Diabetes Mellitus is characterized by an autoimmune-mediated
destruction of insulin-producing beta cells in the pancreas, leading to absolute insulin
deficiency.
2. A patient presents with weight loss, heat intolerance, and exophthalmos.
Which lab finding would most likely support a diagnosis of Graves’ disease?
A. Elevated TSH and low T4
B. Low TSH and low T4
C. Low TSH and elevated T4
D. Elevated TSH and elevated T4
Answer: C
Rationale: In Graves’ disease (hyperthyroidism), the negative feedback loop causes TSH to
be suppressed (low) while thyroid hormones (T4/T3) are elevated.
,3. What is the clinical hallmark of Nephrotic Syndrome?
A. Hematuria and hypertension
B. Oliguria and azotemia
C. Pyuria and flank pain
D. Proteinuria exceeding 3.5g/day
Answer: D
Rationale: Nephrotic syndrome is defined by massive proteinuria (usually >3.5g/24h) due
to increased glomerular permeability.
4. In the context of Chronic Kidney Disease (CKD), why does anemia frequently
occur?
A. Chronic blood loss in the urine
B. Iron malabsorption in the gut
C. Deficiency in erythropoietin production
D. Shortened lifespan of red blood cells
Answer: C
Rationale: The kidneys produce erythropoietin; in CKD, the reduction in functional renal
mass leads to decreased EPO production, resulting in anemia.
5. Which condition is characterized by the presence of skip lesions throughout
the gastrointestinal tract?
A. Ulcerative Colitis
B. Crohn’s Disease
C. Diverticulosis
D. Irritable Bowel Syndrome
Answer: B
Rationale: Crohn’s disease is an inflammatory bowel disease that can affect any part of the
GI tract and is characterized by ‘skip lesions’ (areas of inflammation separated by healthy
tissue).
, 6. A patient with cirrhosis develops portal hypertension. Which complication is
most directly related to this increased pressure?
A. Esophageal varices
B. Asterixis
C. Jaundice
D. Hypoalbuminemia
Answer: A
Rationale: Portal hypertension causes blood to be shunted into collateral vessels, leading
to the formation of life-threatening esophageal varices.
7. What is the primary hormonal abnormality in Cushing’s Syndrome?
A. Hyposecretion of Aldosterone
B. Hypersecretion of Growth Hormone
C. Hyposecretion of ADH
D. Hypersecretion of Cortisol
Answer: D
Rationale: Cushing’s Syndrome refers to the clinical features resulting from chronic
exposure to excessive levels of cortisol.
8. Which of the following is a common cause of Pre-renal Acute Kidney Injury
(AKI)?
A. Hypovolemia
B. Kidney stones
C. Nephrotoxic drugs
D. Glomerulonephritis
Answer: A
Rationale: Pre-renal AKI is caused by factors that reduce renal blood flow, such as
hypovolemia, hemorrhage, or heart failure, without direct damage to the kidney tissue.
Pathophysiology 2026 Chamberlain College
1. Which of the following is the primary pathophysiological mechanism behind
Type 1 Diabetes Mellitus?
A. Insulin resistance in peripheral tissues
B. Hypersecretion of glucagon by alpha cells
C. Autoimmune destruction of pancreatic beta cells
D. Excessive glucose production by the liver
Answer: C
Rationale: Type 1 Diabetes Mellitus is characterized by an autoimmune-mediated
destruction of insulin-producing beta cells in the pancreas, leading to absolute insulin
deficiency.
2. A patient presents with weight loss, heat intolerance, and exophthalmos.
Which lab finding would most likely support a diagnosis of Graves’ disease?
A. Elevated TSH and low T4
B. Low TSH and low T4
C. Low TSH and elevated T4
D. Elevated TSH and elevated T4
Answer: C
Rationale: In Graves’ disease (hyperthyroidism), the negative feedback loop causes TSH to
be suppressed (low) while thyroid hormones (T4/T3) are elevated.
,3. What is the clinical hallmark of Nephrotic Syndrome?
A. Hematuria and hypertension
B. Oliguria and azotemia
C. Pyuria and flank pain
D. Proteinuria exceeding 3.5g/day
Answer: D
Rationale: Nephrotic syndrome is defined by massive proteinuria (usually >3.5g/24h) due
to increased glomerular permeability.
4. In the context of Chronic Kidney Disease (CKD), why does anemia frequently
occur?
A. Chronic blood loss in the urine
B. Iron malabsorption in the gut
C. Deficiency in erythropoietin production
D. Shortened lifespan of red blood cells
Answer: C
Rationale: The kidneys produce erythropoietin; in CKD, the reduction in functional renal
mass leads to decreased EPO production, resulting in anemia.
5. Which condition is characterized by the presence of skip lesions throughout
the gastrointestinal tract?
A. Ulcerative Colitis
B. Crohn’s Disease
C. Diverticulosis
D. Irritable Bowel Syndrome
Answer: B
Rationale: Crohn’s disease is an inflammatory bowel disease that can affect any part of the
GI tract and is characterized by ‘skip lesions’ (areas of inflammation separated by healthy
tissue).
, 6. A patient with cirrhosis develops portal hypertension. Which complication is
most directly related to this increased pressure?
A. Esophageal varices
B. Asterixis
C. Jaundice
D. Hypoalbuminemia
Answer: A
Rationale: Portal hypertension causes blood to be shunted into collateral vessels, leading
to the formation of life-threatening esophageal varices.
7. What is the primary hormonal abnormality in Cushing’s Syndrome?
A. Hyposecretion of Aldosterone
B. Hypersecretion of Growth Hormone
C. Hyposecretion of ADH
D. Hypersecretion of Cortisol
Answer: D
Rationale: Cushing’s Syndrome refers to the clinical features resulting from chronic
exposure to excessive levels of cortisol.
8. Which of the following is a common cause of Pre-renal Acute Kidney Injury
(AKI)?
A. Hypovolemia
B. Kidney stones
C. Nephrotoxic drugs
D. Glomerulonephritis
Answer: A
Rationale: Pre-renal AKI is caused by factors that reduce renal blood flow, such as
hypovolemia, hemorrhage, or heart failure, without direct damage to the kidney tissue.
