NCCT Phlebotomy Technician Exam |
Questions and Answers with Rationales
2026/2027 Update
2026/2027 Update — Questions, Answers & Rationales
Section 1: Anatomy and Physiology
1. Which vein is most commonly preferred for routine venipuncture
in the antecubital area?
A. Basilic vein
B. Median cubital vein
C. Femoral vein
D. Dorsalis pedis vein
Answer: B
Rationale: The median cubital vein is commonly preferred because it is
generally well anchored and accessible, making it a good choice for
routine venipuncture.
2. Which blood vessels carry blood toward the heart?
A. Arteries
B. Veins
C. Arterioles only
D. Capillaries only
Answer: B
Rationale: Veins return blood toward the heart, whereas arteries
generally carry blood away from the heart.
,3. Which blood vessels carry blood away from the heart?
A. Veins
B. Arteries
C. Venules
D. Capillaries
Answer: B
Rationale: Arteries carry blood away from the heart. Their walls are
generally thicker than those of veins because they withstand higher
pressure.
4. What is the primary function of red blood cells?
A. Produce antibodies
B. Transport oxygen
C. Form hormones
D. Destroy platelets
Answer: B
Rationale: Red blood cells contain hemoglobin, which binds oxygen
and transports it throughout the body.
5. Which blood component is primarily responsible for clot
formation?
A. Platelets
B. Red blood cells
C. Plasma proteins only
D. Leukocytes
,Answer: A
Rationale: Platelets play a major role in primary hemostasis by adhering
to damaged vessel walls and forming a platelet plug.
6. Which blood component is primarily responsible for immune
defense?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Albumin
Answer: B
Rationale: Leukocytes, or white blood cells, participate in immune
responses and defense against infection.
7. What is plasma?
A. The liquid portion of blood
B. A type of white blood cell
C. A platelet fragment
D. A red blood cell
Answer: A
Rationale: Plasma is the liquid component of blood containing water,
electrolytes, proteins, nutrients, hormones, and waste products.
8. What is the main function of hemoglobin?
, A. Blood clotting
B. Oxygen transport
C. Antibody production
D. Glucose storage
Answer: B
Rationale: Hemoglobin in red blood cells binds oxygen for transport
from the lungs to tissues.
9. Which chamber of the heart pumps oxygenated blood into
systemic circulation?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D
Rationale: The left ventricle pumps oxygenated blood through the aorta
to the body's systemic circulation.
10. What is the purpose of capillaries?
A. Exchange gases, nutrients, and wastes between blood and tissues
B. Pump blood
C. Produce platelets
D. Store urine
Answer: A
Rationale: Capillaries have thin walls that permit exchange of oxygen,
carbon dioxide, nutrients, and waste products between blood and tissues.
Questions and Answers with Rationales
2026/2027 Update
2026/2027 Update — Questions, Answers & Rationales
Section 1: Anatomy and Physiology
1. Which vein is most commonly preferred for routine venipuncture
in the antecubital area?
A. Basilic vein
B. Median cubital vein
C. Femoral vein
D. Dorsalis pedis vein
Answer: B
Rationale: The median cubital vein is commonly preferred because it is
generally well anchored and accessible, making it a good choice for
routine venipuncture.
2. Which blood vessels carry blood toward the heart?
A. Arteries
B. Veins
C. Arterioles only
D. Capillaries only
Answer: B
Rationale: Veins return blood toward the heart, whereas arteries
generally carry blood away from the heart.
,3. Which blood vessels carry blood away from the heart?
A. Veins
B. Arteries
C. Venules
D. Capillaries
Answer: B
Rationale: Arteries carry blood away from the heart. Their walls are
generally thicker than those of veins because they withstand higher
pressure.
4. What is the primary function of red blood cells?
A. Produce antibodies
B. Transport oxygen
C. Form hormones
D. Destroy platelets
Answer: B
Rationale: Red blood cells contain hemoglobin, which binds oxygen
and transports it throughout the body.
5. Which blood component is primarily responsible for clot
formation?
A. Platelets
B. Red blood cells
C. Plasma proteins only
D. Leukocytes
,Answer: A
Rationale: Platelets play a major role in primary hemostasis by adhering
to damaged vessel walls and forming a platelet plug.
6. Which blood component is primarily responsible for immune
defense?
A. Erythrocytes
B. Leukocytes
C. Platelets
D. Albumin
Answer: B
Rationale: Leukocytes, or white blood cells, participate in immune
responses and defense against infection.
7. What is plasma?
A. The liquid portion of blood
B. A type of white blood cell
C. A platelet fragment
D. A red blood cell
Answer: A
Rationale: Plasma is the liquid component of blood containing water,
electrolytes, proteins, nutrients, hormones, and waste products.
8. What is the main function of hemoglobin?
, A. Blood clotting
B. Oxygen transport
C. Antibody production
D. Glucose storage
Answer: B
Rationale: Hemoglobin in red blood cells binds oxygen for transport
from the lungs to tissues.
9. Which chamber of the heart pumps oxygenated blood into
systemic circulation?
A. Right atrium
B. Right ventricle
C. Left atrium
D. Left ventricle
Answer: D
Rationale: The left ventricle pumps oxygenated blood through the aorta
to the body's systemic circulation.
10. What is the purpose of capillaries?
A. Exchange gases, nutrients, and wastes between blood and tissues
B. Pump blood
C. Produce platelets
D. Store urine
Answer: A
Rationale: Capillaries have thin walls that permit exchange of oxygen,
carbon dioxide, nutrients, and waste products between blood and tissues.
