REx-PN Lab Values Exam Review 2026 | Verified Q&A |
Graded A+
1. What is the typical normal range for white blood cells (WBC) in a healthy
adult?
3,500 to 7,500 cells per microliter
1,000 to 3,000 cells per microliter
12,000 to 15,000 cells per microliter
4,500 to 11,000 cells per microliter
2. What is one of the primary roles of magnesium in the human body?
Magnesium is involved in over 300 biochemical reactions.
Magnesium is responsible for oxygen transport.
Magnesium synthesizes proteins.
Magnesium primarily stores energy.
3. Describe how hyponatremia affects the body's fluid balance.
Hyponatremia causes dehydration by reducing fluid intake.
Hyponatremia results in increased sodium levels in the blood.
Hyponatremia leads to an imbalance in fluid distribution, causing
cells to swell due to excess water.
Hyponatremia has no effect on fluid balance.
4. Normal level of calcium is
8.5-10.5 mg/dL
3.5-5 mg/dL
, 120-140 mg/dL
0.7-1.3 mg/dL
5. Describe the significance of magnesium in maintaining overall health.
Magnesium's primary function is to regulate body temperature.
Magnesium is mainly important for blood clotting.
Magnesium plays a crucial role in muscle function, nerve
transmission, and energy production.
Magnesium is essential for the synthesis of DNA only.
6. What is the normal range for sodium (Na+) in the human body?
135-145 mEq/L
8.5-10.5 mg/dL
3.5-5.0 mEq/L
70-100 mg/dL
7. What helps relieve hyponatremia
conivaptan
triamterene
mannitol
furosemide
8. What is one of the primary functions of sodium in the body?
Transports oxygen
Produces energy
, Synthesizes proteins
Regulates fluid balance
9. What is the primary treatment method for hypernatremia?
Potassium supplements
Fluid replacement
Calcium infusion
Sodium restriction
10. Describe the role of sodium in maintaining homeostasis within the body.
Sodium is mainly responsible for the detoxification of the liver.
Sodium is primarily involved in the synthesis of hormones.
Sodium plays a minor role in energy production.
Sodium helps maintain fluid balance and is crucial for nerve and
muscle function.
11. If a patient presents with a WBC count of 15,000 cells per microliter, what
might this indicate about their health status?
Normal immune function
Possible infection or inflammation
Nutritional deficiency
Dehydration
12. Normal range for magnesium (Mg+)
15-25 mg/ dL
Graded A+
1. What is the typical normal range for white blood cells (WBC) in a healthy
adult?
3,500 to 7,500 cells per microliter
1,000 to 3,000 cells per microliter
12,000 to 15,000 cells per microliter
4,500 to 11,000 cells per microliter
2. What is one of the primary roles of magnesium in the human body?
Magnesium is involved in over 300 biochemical reactions.
Magnesium is responsible for oxygen transport.
Magnesium synthesizes proteins.
Magnesium primarily stores energy.
3. Describe how hyponatremia affects the body's fluid balance.
Hyponatremia causes dehydration by reducing fluid intake.
Hyponatremia results in increased sodium levels in the blood.
Hyponatremia leads to an imbalance in fluid distribution, causing
cells to swell due to excess water.
Hyponatremia has no effect on fluid balance.
4. Normal level of calcium is
8.5-10.5 mg/dL
3.5-5 mg/dL
, 120-140 mg/dL
0.7-1.3 mg/dL
5. Describe the significance of magnesium in maintaining overall health.
Magnesium's primary function is to regulate body temperature.
Magnesium is mainly important for blood clotting.
Magnesium plays a crucial role in muscle function, nerve
transmission, and energy production.
Magnesium is essential for the synthesis of DNA only.
6. What is the normal range for sodium (Na+) in the human body?
135-145 mEq/L
8.5-10.5 mg/dL
3.5-5.0 mEq/L
70-100 mg/dL
7. What helps relieve hyponatremia
conivaptan
triamterene
mannitol
furosemide
8. What is one of the primary functions of sodium in the body?
Transports oxygen
Produces energy
, Synthesizes proteins
Regulates fluid balance
9. What is the primary treatment method for hypernatremia?
Potassium supplements
Fluid replacement
Calcium infusion
Sodium restriction
10. Describe the role of sodium in maintaining homeostasis within the body.
Sodium is mainly responsible for the detoxification of the liver.
Sodium is primarily involved in the synthesis of hormones.
Sodium plays a minor role in energy production.
Sodium helps maintain fluid balance and is crucial for nerve and
muscle function.
11. If a patient presents with a WBC count of 15,000 cells per microliter, what
might this indicate about their health status?
Normal immune function
Possible infection or inflammation
Nutritional deficiency
Dehydration
12. Normal range for magnesium (Mg+)
15-25 mg/ dL
