NUR 546/NUR546 Exam 3 V2 | Advanced
Pathophysiology Q&A with Rationale |
William Paterson University
1. A patient presents with extreme thirst, frequent urination, and a very low urine specific
gravity. Which condition is most likely based on these pathophysiology findings?
A. Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
B. Diabetes Insipidus (DI)
C. Hyperosmolar Hyperglycemic State (HHS)
D. Diabetes Mellitus Type 1
Answer: B
Rationale: Diabetes Insipidus is characterized by a deficiency of ADH or a decreased renal
response to ADH, leading to the excretion of large volumes of dilute urine. Patients typically
present with polyuria and polydipsia, and their urine specific gravity is usually below
1.005. This condition contrasts with SIADH, where ADH is excessive and urine is highly
concentrated.
2. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary cause of insulin
deficiency?
A. Autoimmune destruction of pancreatic beta cells
B. Overproduction of glucagon by alpha cells
,C. Peripheral insulin resistance in adipose tissue
D. Downregulation of insulin receptors
Answer: A
Rationale: Type 1 Diabetes Mellitus is primarily an autoimmune disease where the body’s
immune system attacks and destroys the insulin-producing beta cells in the pancreas. This
leads to an absolute deficiency of insulin, requiring lifelong exogenous insulin therapy.
Environmental triggers in genetically susceptible individuals are thought to initiate this
destructive immune response.
3. A patient with a history of Graves’ disease is admitted with a high fever, tachycardia, and
agitation. Which complication is most likely occurring?
A. Thyroid Storm
B. Myxedema Coma
C. Hashimoto’s Encephalopathy
D. Pheochromocytoma Crisis
Answer: A
Rationale: Thyroid Storm is a life-threatening health condition that is associated with
untreated or undertreated hyperthyroidism, such as Graves’ disease. It is characterized by
severe manifestations of hypermetabolism including high fever, cardiac arrhythmias, and
central nervous system dysfunction. Immediate medical intervention is necessary to inhibit
thyroid hormone synthesis and manage systemic effects.
, 4. Which clinical finding is a hallmark of Cushing Syndrome due to excessive glucocorticoid
levels?
A. Truncal obesity and moon face
B. Weight loss and hyperpigmentation
C. Hypotension and hyperkalemia
D. Hypoglycemia and metabolic acidosis
Answer: A
Rationale: Cushing Syndrome results from chronic exposure to excess cortisol, which leads
to characteristic physical changes like moon face, buffalo hump, and truncal obesity.
Cortisol promotes gluconeogenesis and fat redistribution, contributing to these distinct
clinical features. In contrast, Addison’s disease presents with weight loss and
hyperpigmentation due to adrenal insufficiency.
5. A client is diagnosed with SIADH. Which electrolyte abnormality should the nurse prioritize
in the assessment?
A. Hyperkalemia
B. Hypocalcemia
C. Hypernatremia
D. Hyponatremia
Answer: D
Pathophysiology Q&A with Rationale |
William Paterson University
1. A patient presents with extreme thirst, frequent urination, and a very low urine specific
gravity. Which condition is most likely based on these pathophysiology findings?
A. Syndrome of Inappropriate Antidiuretic Hormone (SIADH)
B. Diabetes Insipidus (DI)
C. Hyperosmolar Hyperglycemic State (HHS)
D. Diabetes Mellitus Type 1
Answer: B
Rationale: Diabetes Insipidus is characterized by a deficiency of ADH or a decreased renal
response to ADH, leading to the excretion of large volumes of dilute urine. Patients typically
present with polyuria and polydipsia, and their urine specific gravity is usually below
1.005. This condition contrasts with SIADH, where ADH is excessive and urine is highly
concentrated.
2. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary cause of insulin
deficiency?
A. Autoimmune destruction of pancreatic beta cells
B. Overproduction of glucagon by alpha cells
,C. Peripheral insulin resistance in adipose tissue
D. Downregulation of insulin receptors
Answer: A
Rationale: Type 1 Diabetes Mellitus is primarily an autoimmune disease where the body’s
immune system attacks and destroys the insulin-producing beta cells in the pancreas. This
leads to an absolute deficiency of insulin, requiring lifelong exogenous insulin therapy.
Environmental triggers in genetically susceptible individuals are thought to initiate this
destructive immune response.
3. A patient with a history of Graves’ disease is admitted with a high fever, tachycardia, and
agitation. Which complication is most likely occurring?
A. Thyroid Storm
B. Myxedema Coma
C. Hashimoto’s Encephalopathy
D. Pheochromocytoma Crisis
Answer: A
Rationale: Thyroid Storm is a life-threatening health condition that is associated with
untreated or undertreated hyperthyroidism, such as Graves’ disease. It is characterized by
severe manifestations of hypermetabolism including high fever, cardiac arrhythmias, and
central nervous system dysfunction. Immediate medical intervention is necessary to inhibit
thyroid hormone synthesis and manage systemic effects.
, 4. Which clinical finding is a hallmark of Cushing Syndrome due to excessive glucocorticoid
levels?
A. Truncal obesity and moon face
B. Weight loss and hyperpigmentation
C. Hypotension and hyperkalemia
D. Hypoglycemia and metabolic acidosis
Answer: A
Rationale: Cushing Syndrome results from chronic exposure to excess cortisol, which leads
to characteristic physical changes like moon face, buffalo hump, and truncal obesity.
Cortisol promotes gluconeogenesis and fat redistribution, contributing to these distinct
clinical features. In contrast, Addison’s disease presents with weight loss and
hyperpigmentation due to adrenal insufficiency.
5. A client is diagnosed with SIADH. Which electrolyte abnormality should the nurse prioritize
in the assessment?
A. Hyperkalemia
B. Hypocalcemia
C. Hypernatremia
D. Hyponatremia
Answer: D
