HSC 4558 Exam 1 V3 | HSC 4558 Pathophysiology II | Actual Q&A with
Rationale (HSC4558 Exam 1) | University of Central Florida
1. A 55-year-old patient with chronic kidney disease presents with a glomerular filtration rate
(GFR) of 22 mL/min/1.73m². How would this patient’s condition be staged according to the
National Kidney Foundation classification?
A. Stage 2
B. Stage 3
C. Stage 4
D. Stage 5
Answer: C
Explanation: Stage 4 Chronic Kidney Disease is defined by a severely decreased GFR
ranging from 15 to 29 mL/min. At this stage, the kidneys have lost significant function and
the patient is likely to experience systemic complications like anemia and bone disease.
This classification is vital for determining the intensity of clinical management and
preparing for renal replacement therapy.
2. Which clinical manifestation is a hallmark sign of Nephrotic Syndrome, distinguishing it
from Nephritic Syndrome?
A. Heavy proteinuria (>3.5 g/day)
B. Gross hematuria
C. Rapidly rising blood pressure
D. Red blood cell casts in urine
Answer: A
Explanation: Nephrotic syndrome is characterized by massive proteinuria exceeding 3.5
grams per 24 hours due to glomerular basement membrane damage. This loss of protein
leads to hypoalbuminemia and subsequent generalized edema. In contrast, nephritic
syndrome focuses more on inflammatory processes, resulting in hematuria and RBC casts.
3. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary mechanism leading
to absolute insulin deficiency?
A. Autoimmune destruction of pancreatic beta cells
B. Excessive glucagon secretion by alpha cells
C. Insulin resistance in peripheral tissues
D. Downregulation of insulin receptors
,Answer: A
Explanation: Type 1 Diabetes Mellitus results from a T-cell mediated autoimmune attack
against the beta cells within the islets of Langerhans. This leads to a total lack of
endogenous insulin, necessitating lifelong exogenous insulin replacement. The disease
usually manifests when approximately 80-90% of beta cell mass has been destroyed.
4. A patient is admitted with a serum sodium level of 120 mEq/L and high urine osmolality.
They are diagnosed with Syndrome of Inappropriate Antidiuretic Hormone (SIADH). What is
the underlying fluid imbalance?
A. Hypervolemic hypernatremia
B. Isotonic dehydration
C. Hypovolemic hyponatremia
D. Euvolemic hyponatremia
Answer: D
Explanation: SIADH involves the excessive release of ADH, causing the kidneys to reabsorb
water inappropriately. This leads to a dilutional hyponatremia where the total body water
increases, but without the presence of clinical edema, classifying it as euvolemic. The
condition is often associated with malignancies, CNS disorders, or specific medications.
5. Which of the following physiological changes is most likely to occur in a patient with
untreated Addison’s disease?
A. Hypokalemia and alkalosis
B. Weight gain and central obesity
C. Hyperglycemia and hypertension
D. Hyperpigmentation and hypotension
Answer: D
Explanation: Addison’s disease is characterized by primary adrenal insufficiency, leading
to a deficit in cortisol and aldosterone. The lack of negative feedback causes an increase in
ACTH, which stimulates melanocytes, causing hyperpigmentation. Furthermore, the lack of
aldosterone results in sodium loss and hypotension due to decreased intravascular volume.
6. A patient in the Intensive Care Unit develops Acute Kidney Injury (AKI) following a severe
hemorrhage. This type of AKI is classified as:
A. Intrarenal
B. Postrenal
C. Intrinsic
, D. Prerenal
Answer: D
Explanation: Prerenal AKI is caused by factors that reduce systemic blood flow and
decrease renal perfusion. In this case, hemorrhage leads to hypovolemia, which lowers the
pressure required for glomerular filtration. If the underlying cause of hypoperfusion is
corrected quickly, the renal function typically returns to baseline.
7. What is the primary rationale for the development of renal osteodystrophy in patients with
end-stage renal disease (ESRD)?
A. Excessive vitamin D production by the kidneys
B. Hyperphosphatemia and hypocalcemia
C. Inability to excrete sodium
D. Chronic hypokalemia and muscle wasting
Answer: B
Explanation: In ESRD, the kidneys fail to excrete phosphorus, leading to
hyperphosphatemia, which inversely lowers serum calcium. Additionally, the failing
kidneys cannot activate vitamin D, further reducing calcium absorption. This state triggers
the parathyroid glands to secrete PTH, which resorbs calcium from the bones, leading to
skeletal softening and pain.
8. During the ‘Diuretic Phase’ of Acute Tubular Necrosis (ATN), what is the most significant
clinical concern for the nurse?
A. Rapidly increasing serum creatinine
B. Profound oliguria and pulmonary edema
C. Fluid volume deficit and electrolyte imbalances
D. Development of metabolic acidosis
Answer: C
Explanation: The diuretic phase occurs as the nephrons begin to recover, but the tubular
cells are not yet fully functional enough to concentrate urine. This results in the excretion
of large volumes of dilute urine, which can lead to severe dehydration and potassium
depletion. Monitoring intake, output, and serum electrolyte levels is critical during this
transitional period.
9. Which of the following best describes the pathophysiology of Graves’ Disease?
A. Iodine deficiency leading to goiter
B. Pituitary adenoma secreting excess TSH
Rationale (HSC4558 Exam 1) | University of Central Florida
1. A 55-year-old patient with chronic kidney disease presents with a glomerular filtration rate
(GFR) of 22 mL/min/1.73m². How would this patient’s condition be staged according to the
National Kidney Foundation classification?
A. Stage 2
B. Stage 3
C. Stage 4
D. Stage 5
Answer: C
Explanation: Stage 4 Chronic Kidney Disease is defined by a severely decreased GFR
ranging from 15 to 29 mL/min. At this stage, the kidneys have lost significant function and
the patient is likely to experience systemic complications like anemia and bone disease.
This classification is vital for determining the intensity of clinical management and
preparing for renal replacement therapy.
2. Which clinical manifestation is a hallmark sign of Nephrotic Syndrome, distinguishing it
from Nephritic Syndrome?
A. Heavy proteinuria (>3.5 g/day)
B. Gross hematuria
C. Rapidly rising blood pressure
D. Red blood cell casts in urine
Answer: A
Explanation: Nephrotic syndrome is characterized by massive proteinuria exceeding 3.5
grams per 24 hours due to glomerular basement membrane damage. This loss of protein
leads to hypoalbuminemia and subsequent generalized edema. In contrast, nephritic
syndrome focuses more on inflammatory processes, resulting in hematuria and RBC casts.
3. In the pathophysiology of Type 1 Diabetes Mellitus, what is the primary mechanism leading
to absolute insulin deficiency?
A. Autoimmune destruction of pancreatic beta cells
B. Excessive glucagon secretion by alpha cells
C. Insulin resistance in peripheral tissues
D. Downregulation of insulin receptors
,Answer: A
Explanation: Type 1 Diabetes Mellitus results from a T-cell mediated autoimmune attack
against the beta cells within the islets of Langerhans. This leads to a total lack of
endogenous insulin, necessitating lifelong exogenous insulin replacement. The disease
usually manifests when approximately 80-90% of beta cell mass has been destroyed.
4. A patient is admitted with a serum sodium level of 120 mEq/L and high urine osmolality.
They are diagnosed with Syndrome of Inappropriate Antidiuretic Hormone (SIADH). What is
the underlying fluid imbalance?
A. Hypervolemic hypernatremia
B. Isotonic dehydration
C. Hypovolemic hyponatremia
D. Euvolemic hyponatremia
Answer: D
Explanation: SIADH involves the excessive release of ADH, causing the kidneys to reabsorb
water inappropriately. This leads to a dilutional hyponatremia where the total body water
increases, but without the presence of clinical edema, classifying it as euvolemic. The
condition is often associated with malignancies, CNS disorders, or specific medications.
5. Which of the following physiological changes is most likely to occur in a patient with
untreated Addison’s disease?
A. Hypokalemia and alkalosis
B. Weight gain and central obesity
C. Hyperglycemia and hypertension
D. Hyperpigmentation and hypotension
Answer: D
Explanation: Addison’s disease is characterized by primary adrenal insufficiency, leading
to a deficit in cortisol and aldosterone. The lack of negative feedback causes an increase in
ACTH, which stimulates melanocytes, causing hyperpigmentation. Furthermore, the lack of
aldosterone results in sodium loss and hypotension due to decreased intravascular volume.
6. A patient in the Intensive Care Unit develops Acute Kidney Injury (AKI) following a severe
hemorrhage. This type of AKI is classified as:
A. Intrarenal
B. Postrenal
C. Intrinsic
, D. Prerenal
Answer: D
Explanation: Prerenal AKI is caused by factors that reduce systemic blood flow and
decrease renal perfusion. In this case, hemorrhage leads to hypovolemia, which lowers the
pressure required for glomerular filtration. If the underlying cause of hypoperfusion is
corrected quickly, the renal function typically returns to baseline.
7. What is the primary rationale for the development of renal osteodystrophy in patients with
end-stage renal disease (ESRD)?
A. Excessive vitamin D production by the kidneys
B. Hyperphosphatemia and hypocalcemia
C. Inability to excrete sodium
D. Chronic hypokalemia and muscle wasting
Answer: B
Explanation: In ESRD, the kidneys fail to excrete phosphorus, leading to
hyperphosphatemia, which inversely lowers serum calcium. Additionally, the failing
kidneys cannot activate vitamin D, further reducing calcium absorption. This state triggers
the parathyroid glands to secrete PTH, which resorbs calcium from the bones, leading to
skeletal softening and pain.
8. During the ‘Diuretic Phase’ of Acute Tubular Necrosis (ATN), what is the most significant
clinical concern for the nurse?
A. Rapidly increasing serum creatinine
B. Profound oliguria and pulmonary edema
C. Fluid volume deficit and electrolyte imbalances
D. Development of metabolic acidosis
Answer: C
Explanation: The diuretic phase occurs as the nephrons begin to recover, but the tubular
cells are not yet fully functional enough to concentrate urine. This results in the excretion
of large volumes of dilute urine, which can lead to severe dehydration and potassium
depletion. Monitoring intake, output, and serum electrolyte levels is critical during this
transitional period.
9. Which of the following best describes the pathophysiology of Graves’ Disease?
A. Iodine deficiency leading to goiter
B. Pituitary adenoma secreting excess TSH
