NRS 455 Exam 4 V3 | NRS 455
Pathophysiology | Actual Q&A with
Rationale (NRS455 Exam 4) | Grand
Canyon University
1. A patient presents with polydipsia, polyphagia, and polyuria. Which of the following
pathophysiological mechanisms best explains the polyuria associated with Diabetes Mellitus?
A. Increased water intake due to hypothalamic stimulation.
B. Reduced secretion of Antidiuretic Hormone (ADH).
C. Osmotic diuresis resulting from glycosuria.
D. Damage to the glomerular basement membrane causing protein leakage.
Correct Answer: C
Rationale: In diabetes mellitus, blood glucose levels exceed the renal threshold, leading to
glucose being excreted in the urine. This glycosuria creates an osmotic gradient that pulls
water into the renal tubules, resulting in excessive urine output. This process is known as
osmotic diuresis and is a hallmark clinical manifestation of hyperglycemia.
2. A nurse is assessing a patient with suspected Hypoglycemia. Which clinical manifestations
should the nurse expect? Select all that apply.
A. Diaphoresis
B. Tremors
,C. Bradycardia
D. Irritability
E. Fruity-smelling breath
F. Tachycardia
Correct Answer: A,B,D,F
Rationale: Hypoglycemia triggers the activation of the sympathetic nervous system,
leading to symptoms like diaphoresis, tremors, and tachycardia. Irritability and confusion
occur as the brain is deprived of its primary energy source, glucose. Bradycardia and fruity
breath are typically associated with other conditions like heart block or diabetic
ketoacidosis, respectively.
3. Which of the following is the primary underlying cause of Type 1 Diabetes Mellitus?
A. Autoimmune destruction of pancreatic beta cells.
B. Obesity and sedentary lifestyle.
C. Insulin resistance in peripheral tissues.
D. Excessive glucagon secretion by alpha cells.
Correct Answer: A
Rationale: Type 1 Diabetes Mellitus is characterized by an absolute insulin deficiency due
to the autoimmune-mediated destruction of insulin-producing beta cells in the pancreas.
, This is often triggered by genetic predisposition and environmental factors. Unlike Type 2,
it is not primarily driven by insulin resistance or lifestyle factors.
4. A patient with Type 2 Diabetes is being evaluated for Chronic Kidney Disease (CKD). What
is the earliest clinical indicator of diabetic nephropathy?
A. Elevated Serum Creatinine
B. Decreased Glomerular Filtration Rate (GFR)
C. Glycosuria
D. Microalbuminuria
Correct Answer: D
Rationale: Microalbuminuria, or the presence of small amounts of albumin in the urine, is
the earliest marker of damage to the glomerular capillaries in diabetic patients. As the
disease progresses, GFR decreases and creatinine levels rise. Routine screening for
albuminuria is essential for early intervention and prevention of end-stage renal disease.
5. A patient is diagnosed with Grave’s Disease. Which of the following findings are consistent
with this diagnosis? Select all that apply.
A. Exophthalmos
B. Weight gain
C. Heat intolerance
D. Goiter
Pathophysiology | Actual Q&A with
Rationale (NRS455 Exam 4) | Grand
Canyon University
1. A patient presents with polydipsia, polyphagia, and polyuria. Which of the following
pathophysiological mechanisms best explains the polyuria associated with Diabetes Mellitus?
A. Increased water intake due to hypothalamic stimulation.
B. Reduced secretion of Antidiuretic Hormone (ADH).
C. Osmotic diuresis resulting from glycosuria.
D. Damage to the glomerular basement membrane causing protein leakage.
Correct Answer: C
Rationale: In diabetes mellitus, blood glucose levels exceed the renal threshold, leading to
glucose being excreted in the urine. This glycosuria creates an osmotic gradient that pulls
water into the renal tubules, resulting in excessive urine output. This process is known as
osmotic diuresis and is a hallmark clinical manifestation of hyperglycemia.
2. A nurse is assessing a patient with suspected Hypoglycemia. Which clinical manifestations
should the nurse expect? Select all that apply.
A. Diaphoresis
B. Tremors
,C. Bradycardia
D. Irritability
E. Fruity-smelling breath
F. Tachycardia
Correct Answer: A,B,D,F
Rationale: Hypoglycemia triggers the activation of the sympathetic nervous system,
leading to symptoms like diaphoresis, tremors, and tachycardia. Irritability and confusion
occur as the brain is deprived of its primary energy source, glucose. Bradycardia and fruity
breath are typically associated with other conditions like heart block or diabetic
ketoacidosis, respectively.
3. Which of the following is the primary underlying cause of Type 1 Diabetes Mellitus?
A. Autoimmune destruction of pancreatic beta cells.
B. Obesity and sedentary lifestyle.
C. Insulin resistance in peripheral tissues.
D. Excessive glucagon secretion by alpha cells.
Correct Answer: A
Rationale: Type 1 Diabetes Mellitus is characterized by an absolute insulin deficiency due
to the autoimmune-mediated destruction of insulin-producing beta cells in the pancreas.
, This is often triggered by genetic predisposition and environmental factors. Unlike Type 2,
it is not primarily driven by insulin resistance or lifestyle factors.
4. A patient with Type 2 Diabetes is being evaluated for Chronic Kidney Disease (CKD). What
is the earliest clinical indicator of diabetic nephropathy?
A. Elevated Serum Creatinine
B. Decreased Glomerular Filtration Rate (GFR)
C. Glycosuria
D. Microalbuminuria
Correct Answer: D
Rationale: Microalbuminuria, or the presence of small amounts of albumin in the urine, is
the earliest marker of damage to the glomerular capillaries in diabetic patients. As the
disease progresses, GFR decreases and creatinine levels rise. Routine screening for
albuminuria is essential for early intervention and prevention of end-stage renal disease.
5. A patient is diagnosed with Grave’s Disease. Which of the following findings are consistent
with this diagnosis? Select all that apply.
A. Exophthalmos
B. Weight gain
C. Heat intolerance
D. Goiter
