PHLBT Phlebotomy Exam

PHLBT Phlebotomy Exam
Question 1. Which chamber of the heart receives oxygen-poor blood

from the body?


A) Left atrium


B) Right atrium


C) Left ventricle


D) Right ventricle


Answer: B


Explanation: The right atrium receives deoxygenated blood from the

body via the superior and inferior vena cava.




Question 2. What is the primary function of red blood cells?


A) Producing antibodies


B) Transporting oxygen

,PHLBT Phlebotomy Exam
C) Initiating clotting


D) Fighting infection


Answer: B


Explanation: Red blood cells contain hemoglobin, which is essential for

transporting oxygen from the lungs to tissues.




Question 3. Which blood vessel carries oxygen-rich blood from the lungs

to the heart?


A) Pulmonary vein


B) Pulmonary artery


C) Aorta


D) Superior vena cava


Answer: A

,PHLBT Phlebotomy Exam
Explanation: The pulmonary vein carries oxygenated blood from the

lungs to the left atrium of the heart.




Question 4. Which type of blood cell is primarily responsible for fighting

infections?


A) Platelets


B) Erythrocytes


C) Leukocytes


D) Thrombocytes


Answer: C


Explanation: Leukocytes (white blood cells) defend the body against

infectious disease and foreign invaders.




Question 5. What is the main function of platelets?

, PHLBT Phlebotomy Exam
A) Oxygen transport


B) Blood clotting


C) Immune defense


D) Nutrient absorption


Answer: B


Explanation: Platelets (thrombocytes) are small cell fragments that help

initiate the clotting process to stop bleeding.




Question 6. Which blood component is a liquid that makes up over half

of total blood volume?


A) Serum


B) Plasma


C) Red cells