NSG 530 Exam 3 Actual Exam V2 | NSG 530 Advanced
Pathophysiology (NSG530 Exam 3) [PDF] | Wilkes University
1. A 54-year-old patient with Type 2 Diabetes presents with a Hemoglobin A1c of 8.5%. The
underlying mechanism of insulin resistance in this patient primarily involves which of the
following?
A. Down-regulation of insulin receptors and post-receptor signaling defects
B. Autoimmune destruction of pancreatic beta cells
C. Absolute deficiency of insulin production by the Islets of Langerhans
D. Increased sensitivity of peripheral tissues to circulating insulin
Answer: A
Rationale: Insulin resistance in Type 2 Diabetes involves a decreased cellular response to
insulin, often due to obesity-related inflammatory cytokines. This leads to impaired post-
receptor signaling and a down-regulation of insulin receptors in target tissues like muscle
and fat. The AI analysis indicates that unlike Type 1, Type 2 is characterized by relative
rather than absolute insulin deficiency initially.
2. A patient presents to the ED with a plasma glucose of 750 mg/dL, serum osmolality of 330
mOsm/kg, and no significant ketones in the urine. Which condition is most likely?
A. Diabetic Ketoacidosis (DKA)
B. Hyperosmolar Hyperglycemic State (HHS)
C. Hypoglycemic Unawareness
D. Metabolic Acidosis with Anion Gap
Answer: B
Rationale: HHS is characterized by extreme hyperglycemia and hyperosmolality without
significant ketosis because there is enough insulin to prevent lipolysis. The lack of
metabolic acidosis distinguishes it from DKA. AI analysis shows that this condition typically
occurs in Type 2 diabetics who experience severe dehydration.
3. Which laboratory finding is most consistent with primary hypothyroidism (Hashimoto’s
Thyroiditis)?
A. Low TSH, High T4
B. High TSH, High T4
C. Low TSH, Low T4
D. High TSH, Low T4
,Answer: D
Rationale: In primary hypothyroidism, the thyroid gland fails to produce sufficient T4,
which removes the negative feedback on the pituitary. Consequently, the pituitary
increases the secretion of Thyroid Stimulating Hormone (TSH). AI analysis confirms that
TSH is the most sensitive indicator for primary thyroid failure.
4. A 32-year-old female presents with exophthalmos, heat intolerance, and a fine tremor.
What is the most likely pathophysiological cause?
A. Destruction of thyroid follicles by cytotoxic T-cells
B. Thyroid-stimulating immunoglobulins (TSI) binding to TSH receptors
C. Iodine deficiency leading to goiter formation
D. Pituitary adenoma secreting excessive TSH
Answer: B
Rationale: Graves’ disease is an autoimmune disorder where TSI act as agonists for TSH
receptors, stimulating excessive thyroid hormone production. This leads to
hyperthyroidism and specific features like exophthalmos. AI analysis notes that these
antibodies bypass the normal regulatory feedback loop.
5. A patient with chronic kidney disease (CKD) presents with a pH of 7.31, PaCO2 of 32 mmHg,
and HCO3 of 18 mEq/L. Which statement best describes this acid-base status?
A. Uncompensated metabolic acidosis
B. Respiratory acidosis with renal compensation
C. Metabolic alkalosis with respiratory compensation
D. Metabolic acidosis with partial respiratory compensation
Answer: D
Rationale: The low pH and low HCO3 indicate metabolic acidosis, which is common in CKD
due to the inability to excrete hydrogen ions. The PaCO2 is low, indicating the lungs are
attempting to compensate by blowing off CO2. AI analysis suggests that the compensation
is partial because the pH has not yet returned to the normal range.
6. Cushing’s syndrome, caused by excessive cortisol, is often associated with which clinical
finding?
A. Hyperkalemia and hypotension
B. Skin hyperpigmentation and weight loss
C. Increased sensitivity to insulin and hypoglycemia
D. Central obesity, thin extremities, and striae
, Answer: D
Rationale: Excess glucocorticoids lead to abnormal fat distribution (buffalo hump and
moon face) and protein wasting in the extremities. Cortisol also inhibits collagen synthesis,
leading to thin skin and purple striae. AI analysis identifies that these catabolic effects are
hallmark features of cortisol excess.
7. What is the primary pathophysiology behind the development of prerenal Acute Kidney
Injury (AKI)?
A. Direct damage to the renal parenchyma from toxins
B. Decreased renal perfusion due to systemic hypotension or hypovolemia
C. Obstruction of the urinary tract by kidney stones
D. Inflammation of the glomeruli following a viral infection
Answer: B
Rationale: Prerenal AKI occurs when there is a reduction in blood flow to the kidney,
which decreases the glomerular filtration rate. This can result from heart failure,
dehydration, or shock. AI analysis emphasizes that in prerenal AKI, the kidney structure
itself remains intact initially.
8. A patient with Nephrotic Syndrome presents with significant generalized edema. What is
the physiological basis for this edema?
A. Increased capillary hydrostatic pressure
B. Decreased production of antidiuretic hormone (ADH)
C. Increased systemic vascular resistance
D. Decreased plasma oncotic pressure due to albuminuria
Answer: D
Rationale: Nephrotic syndrome involves massive proteinuria (specifically albuminuria),
which leads to hypoalbuminemia. As albumin levels drop, plasma oncotic pressure
decreases, allowing fluid to leak into the interstitial space. AI analysis highlights that this
triggers the RAAS system, further worsening fluid retention.
9. A patient presents with a BP of 190/110 mmHg, headache, and palpitations. Laboratory
tests show elevated urinary catecholamines. What is the most likely diagnosis?
A. Conn’s Syndrome
B. Addison’s Disease
C. Diabetes Insipidus
D. Pheochromocytoma
Pathophysiology (NSG530 Exam 3) [PDF] | Wilkes University
1. A 54-year-old patient with Type 2 Diabetes presents with a Hemoglobin A1c of 8.5%. The
underlying mechanism of insulin resistance in this patient primarily involves which of the
following?
A. Down-regulation of insulin receptors and post-receptor signaling defects
B. Autoimmune destruction of pancreatic beta cells
C. Absolute deficiency of insulin production by the Islets of Langerhans
D. Increased sensitivity of peripheral tissues to circulating insulin
Answer: A
Rationale: Insulin resistance in Type 2 Diabetes involves a decreased cellular response to
insulin, often due to obesity-related inflammatory cytokines. This leads to impaired post-
receptor signaling and a down-regulation of insulin receptors in target tissues like muscle
and fat. The AI analysis indicates that unlike Type 1, Type 2 is characterized by relative
rather than absolute insulin deficiency initially.
2. A patient presents to the ED with a plasma glucose of 750 mg/dL, serum osmolality of 330
mOsm/kg, and no significant ketones in the urine. Which condition is most likely?
A. Diabetic Ketoacidosis (DKA)
B. Hyperosmolar Hyperglycemic State (HHS)
C. Hypoglycemic Unawareness
D. Metabolic Acidosis with Anion Gap
Answer: B
Rationale: HHS is characterized by extreme hyperglycemia and hyperosmolality without
significant ketosis because there is enough insulin to prevent lipolysis. The lack of
metabolic acidosis distinguishes it from DKA. AI analysis shows that this condition typically
occurs in Type 2 diabetics who experience severe dehydration.
3. Which laboratory finding is most consistent with primary hypothyroidism (Hashimoto’s
Thyroiditis)?
A. Low TSH, High T4
B. High TSH, High T4
C. Low TSH, Low T4
D. High TSH, Low T4
,Answer: D
Rationale: In primary hypothyroidism, the thyroid gland fails to produce sufficient T4,
which removes the negative feedback on the pituitary. Consequently, the pituitary
increases the secretion of Thyroid Stimulating Hormone (TSH). AI analysis confirms that
TSH is the most sensitive indicator for primary thyroid failure.
4. A 32-year-old female presents with exophthalmos, heat intolerance, and a fine tremor.
What is the most likely pathophysiological cause?
A. Destruction of thyroid follicles by cytotoxic T-cells
B. Thyroid-stimulating immunoglobulins (TSI) binding to TSH receptors
C. Iodine deficiency leading to goiter formation
D. Pituitary adenoma secreting excessive TSH
Answer: B
Rationale: Graves’ disease is an autoimmune disorder where TSI act as agonists for TSH
receptors, stimulating excessive thyroid hormone production. This leads to
hyperthyroidism and specific features like exophthalmos. AI analysis notes that these
antibodies bypass the normal regulatory feedback loop.
5. A patient with chronic kidney disease (CKD) presents with a pH of 7.31, PaCO2 of 32 mmHg,
and HCO3 of 18 mEq/L. Which statement best describes this acid-base status?
A. Uncompensated metabolic acidosis
B. Respiratory acidosis with renal compensation
C. Metabolic alkalosis with respiratory compensation
D. Metabolic acidosis with partial respiratory compensation
Answer: D
Rationale: The low pH and low HCO3 indicate metabolic acidosis, which is common in CKD
due to the inability to excrete hydrogen ions. The PaCO2 is low, indicating the lungs are
attempting to compensate by blowing off CO2. AI analysis suggests that the compensation
is partial because the pH has not yet returned to the normal range.
6. Cushing’s syndrome, caused by excessive cortisol, is often associated with which clinical
finding?
A. Hyperkalemia and hypotension
B. Skin hyperpigmentation and weight loss
C. Increased sensitivity to insulin and hypoglycemia
D. Central obesity, thin extremities, and striae
, Answer: D
Rationale: Excess glucocorticoids lead to abnormal fat distribution (buffalo hump and
moon face) and protein wasting in the extremities. Cortisol also inhibits collagen synthesis,
leading to thin skin and purple striae. AI analysis identifies that these catabolic effects are
hallmark features of cortisol excess.
7. What is the primary pathophysiology behind the development of prerenal Acute Kidney
Injury (AKI)?
A. Direct damage to the renal parenchyma from toxins
B. Decreased renal perfusion due to systemic hypotension or hypovolemia
C. Obstruction of the urinary tract by kidney stones
D. Inflammation of the glomeruli following a viral infection
Answer: B
Rationale: Prerenal AKI occurs when there is a reduction in blood flow to the kidney,
which decreases the glomerular filtration rate. This can result from heart failure,
dehydration, or shock. AI analysis emphasizes that in prerenal AKI, the kidney structure
itself remains intact initially.
8. A patient with Nephrotic Syndrome presents with significant generalized edema. What is
the physiological basis for this edema?
A. Increased capillary hydrostatic pressure
B. Decreased production of antidiuretic hormone (ADH)
C. Increased systemic vascular resistance
D. Decreased plasma oncotic pressure due to albuminuria
Answer: D
Rationale: Nephrotic syndrome involves massive proteinuria (specifically albuminuria),
which leads to hypoalbuminemia. As albumin levels drop, plasma oncotic pressure
decreases, allowing fluid to leak into the interstitial space. AI analysis highlights that this
triggers the RAAS system, further worsening fluid retention.
9. A patient presents with a BP of 190/110 mmHg, headache, and palpitations. Laboratory
tests show elevated urinary catecholamines. What is the most likely diagnosis?
A. Conn’s Syndrome
B. Addison’s Disease
C. Diabetes Insipidus
D. Pheochromocytoma
