#1
Which of the following is not a component of the circulatory system?
Liver
ExplanationLiver is not a component; heart, blood vessels, and blood are.
#2
What is the main function of the circulatory system?
Transporting oxygen to cells
ExplanationThe primary function is oxygen transportation.
#3
Which of the following is not a type of blood vessel?
Alveolus
ExplanationAlveolus is not a blood vessel type; arteries, veins, and capillaries are.
#4
What is the main function of red blood cells?
Transporting oxygen
ExplanationRed blood cells primarily transport oxygen.
#5
Which component of blood is responsible for clotting?
Platelets
ExplanationPlatelets are responsible for blood clotting.
#6
Which type of blood vessel carries blood away from the heart?
Arteries
ExplanationArteries carry blood away from the heart.
#7
What is the liquid part of the blood called?
Plasma
ExplanationPlasma is the liquid component of blood.
#8
What is the term for the process by which white blood cells engulf and digest pathogens?
Phagocytosis
ExplanationPhagocytosis is the process.
#9
What is the average adult human's resting heart rate?
70-80 beats per minute
ExplanationThe average resting heart rate is within this range.
#10
Which valve separates the left atrium from the left ventricle?
Mitral valve
ExplanationMitral valve separates these heart chambers.
#11
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle pumps oxygenated blood.
#12
Which of the following is not a function of the lymphatic system?
Digesting food
ExplanationLymphatic system doesn't digest food; it aids in immune response, fluid balance, and fat absorption.
#13
Which blood type is considered the universal recipient?
AB
ExplanationAB blood type can receive all other blood types.
#14
What is the name of the largest artery in the human body?
Aorta
ExplanationThe largest artery is the aorta.
#15
Which of the following is not a component of the heart's electrical conduction system?
Pulmonary valve
ExplanationPulmonary valve is not part of the electrical conduction system; sinoatrial node, atrioventricular node, and bundle of His are.