Comprehensive Resource To Help You Ace 2026-2027
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1. Which component of blood is the liquid portion and is composed mostly of
water?
A. Red blood cells
B. White blood cells
C. Plasma
D. Platelets
Correct answer: C. Plasma
2. Which of the following is a key function of plasma?
A. Oxygen transport
B. Immune defense
C. Blood clotting
D. Maintaining fluid balance and blood pH
Correct answer: D. Maintaining fluid balance and blood pH
3. Which blood cells are responsible for transporting oxygen from the lungs to
body tissues?
A. White blood cells
B. Platelets
C. Plasma proteins
,D. Red blood cells
Correct answer: D. Red blood cells
4. Which blood cells function as part of the immune system to identify and
destroy foreign invaders?
A. Platelets
B. Red blood cells
C. White blood cells
D. Plasma
Correct answer: C. White blood cells
5. Which blood component consists of cell fragments that help stop bleeding?
A. Plasma
B. White blood cells
C. Platelets
D. Red blood cells
Correct answer: C. Platelets
6. A biomarker is best defined as:
A. A type of immune cell
B. A nutritional supplement
C. A measurable molecule or trait linked to a disease or health condition
D. A diagnostic imaging tool
Correct answer: C. A measurable molecule or trait linked to a disease or health
condition
7. Which of the following can influence blood test results?
, A. Physical activity
B. Diet and alcohol intake
C. Medication use
D. All of the above
Correct answer: D. All of the above
8. Red blood cell count primarily reflects:
A. Immune function
B. Oxygen-carrying capacity
C. Blood clotting ability
D. Kidney function
Correct answer: B. Oxygen-carrying capacity
9. Hematocrit measures:
A. Total blood volume
B. White blood cell activity
C. Red blood cell volume and anemia risk
D. Platelet function
Correct answer: C. Red blood cell volume and anemia risk
10. Hemoglobin levels are used to assess:
A. Liver function
B. Kidney filtration
C. Oxygen-carrying capacity
D. Blood glucose control
Correct answer: C. Oxygen-carrying capacity
11. An elevated white blood cell count most commonly indicates: