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The Acid-Base Abyss

100

A patient’s ABG results are pH 7.30, PaCO2 35, and HCO3 20. The nurse interprets this as: A) Uncompensated Respiratory Acidosis B) Uncompensated Metabolic Acidosis C) Partially Compensated Respiratory Alkalosis D) Fully Compensated Metabolic Acidosis

• Answer: B
• Rationale: The pH is low (<7.35), indicating acidosis. The HCO3 is low (<22 mEq/L), which is the metabolic cause. Because the PaCO2 is within the normal range (35–45), no respiratory compensation has occurred

200

Which statement best describes the function of a buffer system in the body? A) It eliminates all hydrogen ions from the plasma through the kidneys. B) It trades stronger acids and bases for weaker ones to resist pH change. C) It reacts in hours to days to regulate the CO2 levels in the lungs. D) It converts all bicarbonate into carbonic acid to lower the pH

• Answer: B
• Rationale: Buffer systems work by mixing acids and bases to resist drastic changes in pH, essentially trading stronger acids for weaker ones to maintain balance

300

A patient has a pH of 7.28, a PaCO2 of 34, and an HCO3 of 19. The nurse identifies this as: A) Uncompensated Metabolic Acidosis B) Partially Compensated Metabolic Acidosis C) Fully Compensated Respiratory Acidosis D) Uncompensated Respiratory Alkalosis

• Answer: B
• Rationale: The pH is low (acidosis) and the HCO3 is low (metabolic cause). The PaCO2 is also low, indicating the lungs are trying to "blow off" CO2 to compensate, but since the pH is not yet normal, it is only "partially" compensated

400

The nurse is reviewing an anion gap calculation for a patient in metabolic acidosis. The primary purpose of this calculation is to: A) Determine the rate of renal filtration. B) Identify if the acidosis is caused by excess organic acids. C) Measure the exact amount of CO2 in the blood. D) Assess the function of the parathyroid gland

• Answer: B
• Rationale: The anion gap is a calculation of major cations and anions used to indicate acid-base balance; an elevated gap specifically helps identify acidosis due to excess organic acids like ketones or lactic acid

500

 Interpret the following ABG: pH 7.44, PaCO2 34, and HCO3 13. A) Fully Compensated Respiratory Alkalosis B) Uncompensated Respiratory Alkalosis C) Partially Compensated Metabolic Acidosis D) Fully Compensated Metabolic Acidosis

• Answer: A
• Rationale: The pH is within the normal range but on the basic side (>7.40). The PaCO2 is low (alkalosis cause) and the HCO3 is very low (renal compensation). Because the pH has returned to the normal range, it is "fully compensated"

Electrolyte Extremes

100

Which clinical situation is most likely to result in Hypokalemia? A) Renal failure B) Treatment of Diabetic Ketoacidosis with insulin C) Extensive tissue damage or burns D) Prolonged or severe metabolic acidosis

• Answer: B
• Rationale: Insulin shifts potassium into the cells along with glucose, which can lead to low serum potassium levels (hypokalemia) during DKA treatment

200

Following a total thyroidectomy, a patient reports "pins and needles" in the hands and exhibits muscle cramps. The nurse should immediately assess for: A) Hypercalcemia B) Hypocalcemia C) Hypernatremia D) Hypokalemia

• Answer: B
• Rationale: Accidental damage to the parathyroid glands during thyroid surgery leads to hypoparathyroidism and low calcium levels, manifesting as tingling (paresthesia) and muscle cramps

300

 A patient presents with dry, rough mucous membranes, edema, and increased blood pressure. The nurse suspects which imbalance? A) Hyponatremia B) Hypernatremia C) Hypokalemia D) Hypermagnesemia

• Answer: B
• Rationale: Hypernatremia, or high sodium, causes water to shift out of cells, leading to dry membranes, edema, and increased blood pressure due to fluid retention

400

In a patient with prolonged acidosis, the nurse expects to see an increase in which electrolyte due to ion displacement from cells? A) Sodium B) Calcium C) Potassium D) Magnesium

• Answer: C
• Rationale: Acidosis involves a high concentration of H+ ions in the blood; these ions enter cells and displace potassium, causing potassium to move into the extracellular fluid and resulting in hyperkalemia

500

 A patient with renal failure is at high risk for Hypermagnesemia. Which assessment finding is characteristic of this condition? A) Increased strength of cardiac contractions B) Hyperactive deep tendon reflexes C) Depressed neuromuscular function and decreased reflexes D) Excessive thirst and dry skin

• Answer: C
• Rationale: Hypermagnesemia, often seen in renal failure, acts as a neuromuscular depressant, leading to decreased reflexes and lethargy

Endocrine Essentials

100

Which statement correctly distinguishes Type 1 from Type 2 Diabetes Mellitus? A) Type 1 involves a loss of receptor sensitivity, while Type 2 is an inability to make insulin. B) Type 2 can be cured with diet, while Type 1 requires no treatment. C) Type 1 is characterized by an absolute inability to make insulin, while Type 2 involves insulin resistance. D) Only Type 1 patients are at risk for long-term complications like neuropathy

• Answer: C
• Rationale: Type 1 DM is characterized by the inability of the pancreas to produce insulin, whereas Type 2 DM involves the body still producing some insulin but the cells becoming resistant to it

200

The "Classic Three" symptoms of undiagnosed Diabetes Mellitus include: A) Bradycardia, hypotension, and weight gain B) Polyuria, polydipsia, and sudden weight loss C) Edema, hypertension, and moon face D) Seizures, muscle cramps, and brittle nails

• Answer: B
• Rationale: Polyuria (frequent urination), polydipsia (excessive thirst), and sudden unexplained weight loss are hallmark signs of diabetes

300

A patient with Addison’s disease is distinguished from a patient with Cushing’s syndrome by the presence of: A) Obesity of the trunk and face B) Darker pigmentation of the skin (bronzing) C) Glucose intolerance and hypertension D) Purple striae and easy bruising

• Answer: B
• Rationale: Addison’s disease involves high levels of ACTH due to adrenal insufficiency, which leads to hyperpigmentation; Cushing’s is characterized by truncal obesity and "moon face"

400

A patient with SIADH is likely to exhibit which of the following? A) Excessive thirst and large volumes of dilute urine B) Hyponatremia and highly concentrated urine C) Hypoglycemia and weight loss D) Hypercalcemia and bone loss

• Answer: B
• Rationale: SIADH involves excessive ADH, causing the body to retain too much water, which dilutes the blood (hyponatremia) and results in very little, highly concentrated urine output

500

Manifestations of Hypoparathyroidism include: A) Obesity of the trunk, moon face, and buffalo hump B) Hyperpigmentation, hypotension, and syncope C) Seizures, muscle cramps, and tingling in extremities D) Polyuria, polydipsia, and polyphagia

• Answer: C
• Rationale: Low parathyroid hormone leads to hypocalcemia, which increases nerve excitability, causing tingling, muscle cramps, and seizures

Nutritional Nuggets

100

According to recommended daily allowances, what percentage of total caloric intake should come from carbohydrates? A) 10% to 35% B) 20% to 35% C) 45% to 65% D) 70% to 85%

• Answer: C
• Rationale: Standard nutritional requirements suggest that 45% to 65% of daily calories should be derived from carbohydrates

200

A patient with Phenylketonuria (PKU) must follow which dietary restriction for life? A) Elimination of all fats and oils B) Avoidance of high-protein foods and aspartame C) Lifelong elimination of all gluten-containing grains D) Strict reduction of all carbohydrates

• Answer: B
• Rationale: PKU is an inherited metabolic disorder where the body cannot metabolize the amino acid phenylalanine; therefore, high-protein foods and products with aspartame must be avoided

300

 Which clinical manifestation is most associated with Iron-Deficiency Anemia? A) Lanugo and amenorrhea B) Pica (craving non-food items) and brittle nails C) Truncal obesity and moon face D) Steatorrhea and villi atrophy

• Answer: B
• Rationale: Chronic iron deficiency leads to low hemoglobin and systemic symptoms like pica, brittle hair and nails, and mouth sores

400

The nurse assessing a patient with Anorexia Nervosa expects to find: A) Tachycardia and hypertension B) Lanugo, bradycardia, and amenorrhea C) Steatorrhea and abdominal bloating D) Sudden weight gain and moon face

• Answer: B
• Rationale: Anorexia manifestations include severe weight loss, fine body hair (lanugo) for warmth, a slowed heart rate (bradycardia), and the absence of menstruation (amenorrhea)

500

To confirm a diagnosis of Celiac Disease, which procedure is considered the "gold standard"? A) Multiple-day dietary intake recall B) Serum antibody testing for gliadin C) Small bowel biopsy to visualize villi atrophy D) 24-hour urine collection for calcium

• Answer: C
• Rationale: While blood tests can suggest the disease, a definitive diagnosis of Celiac disease is confirmed through a small bowel biopsy that shows the characteristic atrophy of the intestinal villi

Elimination Entanglements

100

A patient with Celiac disease reports fatty, bulky, and foul-smelling stools. The nurse documents this as:  A) Melena B) Pyuria C) Steatorrhea D) Azotemia

• Answer: C
• Rationale: Steatorrhea is the malabsorption of fats resulting in bulky, fatty, and malodorous stools, commonly seen in Celiac disease

200

Why is the inflammatory process in Acute Pancreatitis so dangerous and likely to spread? A) The pancreas produces too much insulin. B) The pancreas lacks a fibrous capsule, allowing enzymes to escape. C) The pancreas is located inside the renal pelvis. D) The condition only occurs in patients with Celiac disease

• Answer: B
• Rationale: Because the pancreas lacks a protective fibrous capsule, destructive enzymes can easily leak out and cause destruction in the surrounding tissues

300

 In Polycystic Kidney Disease (PKD), the progressive decrease in GFR is primarily due to: A) The sudden onset of a urinary tract infection. B) The bilateral growth of fluid-filled cysts that replace functional tissue. C) The overproduction of erythropoietin by the kidneys. D) The accidental removal of the parathyroid glands

• Answer: B
• Rationale: PKD involves the growth of numerous cysts that obstruct tubules and compress vessels, leading to reduced perfusion and functional tissue replacement

400

 "End-Stage Renal Failure" is clinically characterized by the "Three As," which are: A) Anorexia, Agitation, and Amenorrhea B) Azotemia, Anemia, and Acidosis C) Alkalosis, Anuria, and Atrophy D) Anion gap, ADH, and Aldosterone

• Answer: B
• Rationale: End-stage renal failure results in negligible GFR and the retention of wastes, leading specifically to azotemia (high urea/creatinine), anemia (low RBCs), and metabolic acidosis

500

Which type of urinary incontinence is characterized by the inability to reach the bathroom in time due to physical or environmental barriers? A) Stress incontinence B) Urge incontinence C) Functional incontinence D) Overflow incontinence

• Answer: C
• Rationale: Functional incontinence occurs when a patient has normal bladder control but cannot reach the toilet in time because of factors like impaired mobility or environmental obstacles