D115 OA / WGU D115 OA
PREP TEST BANK 2025
Question 1:
Which of the following is the primary function of the kidneys?
A. Regulation of blood glucose levels
B. Production of red blood cells
C. Filtration of blood and removal of waste products
D. Digestion of fats
Answer: C. Filtration of blood and removal of waste products
Question 2:
,What is the normal range for blood pH in humans?
A. 6.8–7.2
B. 7.35–7.45
C. 7.5–8.0
D. 6.0–7.0
Answer: B. 7.35–7.45
Question 3:
Which hormone is responsible for regulating sodium reabsorption in the kidneys?
A. Insulin
B. Aldosterone
C. Glucagon
D. Cortisol
Answer: B. Aldosterone
Question 4:
What is the primary role of antidiuretic hormone (ADH)?
A. Increase blood glucose levels
B. Promote water reabsorption in the kidneys
C. Stimulate red blood cell production
D. Decrease blood pressure
Answer: B. Promote water reabsorption in the kidneys
Question 5:
Which of the following conditions is characterized by excessive thirst and urination?
A. Diabetes insipidus
B. Hypertension
C. Hypokalemia
D. Metabolic acidosis
,Answer: A. Diabetes insipidus
Question 6:
What is the most common cause of metabolic acidosis?
A. Hyperventilation
B. Excessive bicarbonate intake
C. Diabetic ketoacidosis
D. Hypokalemia
Answer: C. Diabetic ketoacidosis
Question 7:
Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A. Hypernatremia
B. Hypokalemia
C. Hypercalcemia
D. Hypophosphatemia
Answer: B. Hypokalemia
Question 8:
What is the primary buffer system in the blood?
A. Phosphate buffer system
B. Protein buffer system
C. Bicarbonate buffer system
D. Ammonia buffer system
Answer: C. Bicarbonate buffer system
Question 9:
Which of the following is a symptom of hypercalcemia?
, A. Muscle spasms
B. Fatigue and weakness
C. Tingling in the fingers
D. Increased deep tendon reflexes
Answer: B. Fatigue and weakness
Question 10:
What is the primary cause of respiratory alkalosis?
A. Hypoventilation
B. Hyperventilation
C. Renal failure
D. Excessive bicarbonate loss
Answer: B. Hyperventilation
Question 11:
Which of the following is a function of the renin-angiotensin-aldosterone system
(RAAS)?
A. Decrease blood pressure
B. Increase sodium excretion
C. Regulate blood volume and pressure
D. Promote potassium retention
Answer: C. Regulate blood volume and pressure
Question 12:
What is the most common cause of chronic kidney disease (CKD)?
A. Hypertension
B. Diabetes mellitus
C. Glomerulonephritis
D. Polycystic kidney disease
PREP TEST BANK 2025
Question 1:
Which of the following is the primary function of the kidneys?
A. Regulation of blood glucose levels
B. Production of red blood cells
C. Filtration of blood and removal of waste products
D. Digestion of fats
Answer: C. Filtration of blood and removal of waste products
Question 2:
,What is the normal range for blood pH in humans?
A. 6.8–7.2
B. 7.35–7.45
C. 7.5–8.0
D. 6.0–7.0
Answer: B. 7.35–7.45
Question 3:
Which hormone is responsible for regulating sodium reabsorption in the kidneys?
A. Insulin
B. Aldosterone
C. Glucagon
D. Cortisol
Answer: B. Aldosterone
Question 4:
What is the primary role of antidiuretic hormone (ADH)?
A. Increase blood glucose levels
B. Promote water reabsorption in the kidneys
C. Stimulate red blood cell production
D. Decrease blood pressure
Answer: B. Promote water reabsorption in the kidneys
Question 5:
Which of the following conditions is characterized by excessive thirst and urination?
A. Diabetes insipidus
B. Hypertension
C. Hypokalemia
D. Metabolic acidosis
,Answer: A. Diabetes insipidus
Question 6:
What is the most common cause of metabolic acidosis?
A. Hyperventilation
B. Excessive bicarbonate intake
C. Diabetic ketoacidosis
D. Hypokalemia
Answer: C. Diabetic ketoacidosis
Question 7:
Which electrolyte imbalance is most likely to cause cardiac arrhythmias?
A. Hypernatremia
B. Hypokalemia
C. Hypercalcemia
D. Hypophosphatemia
Answer: B. Hypokalemia
Question 8:
What is the primary buffer system in the blood?
A. Phosphate buffer system
B. Protein buffer system
C. Bicarbonate buffer system
D. Ammonia buffer system
Answer: C. Bicarbonate buffer system
Question 9:
Which of the following is a symptom of hypercalcemia?
, A. Muscle spasms
B. Fatigue and weakness
C. Tingling in the fingers
D. Increased deep tendon reflexes
Answer: B. Fatigue and weakness
Question 10:
What is the primary cause of respiratory alkalosis?
A. Hypoventilation
B. Hyperventilation
C. Renal failure
D. Excessive bicarbonate loss
Answer: B. Hyperventilation
Question 11:
Which of the following is a function of the renin-angiotensin-aldosterone system
(RAAS)?
A. Decrease blood pressure
B. Increase sodium excretion
C. Regulate blood volume and pressure
D. Promote potassium retention
Answer: C. Regulate blood volume and pressure
Question 12:
What is the most common cause of chronic kidney disease (CKD)?
A. Hypertension
B. Diabetes mellitus
C. Glomerulonephritis
D. Polycystic kidney disease
