MCQ on The Circulatory System
Frequently Asked MCQ quiz on the Circulatory System – MCQ Quiz for Competitive Exam Preparation – These questions given will be useful for competitive exams preparation. We will be updating more mcq regularly, please follow our website regularly.
What is the main function of the circulatory system?
a) Respiration
b) Digestion
c) Transportation of nutrients and oxygen
d) Excretion
Answer: c) Transportation of nutrients and oxygen
Which of the following is the primary organ of the circulatory system?
a) Heart
b) Liver
c) Kidneys
d) Brain
Answer: a) Heart
Which type of blood vessel carries blood away from the heart? a) Veins
b) Capillaries
c) Arteries
d) Venules
Answer: c) Arteries
The liquid component of blood is called:
a) Plasma
b) Platelets
c) Red blood cells
d) White blood cells
Answer: a) Plasma
What is the function of red blood cells?
a) Fight infections
b) Carry oxygen
c) Clot blood
d) Produce antibodies
Answer: b) Carry oxygen
Which of the following is not a type of blood vessel?
a) Artery
b) Vein
c) Nerve
d) Capillary
Answer: c) Nerve
The largest artery in the human body is the:
a) Aorta
b) Pulmonary artery
c) Renal artery
d) Carotid artery
Answer: a) Aorta
Blood is pumped out of the heart into the circulation by the:
a) Atria
b) Ventricles
c) Valves
d) Septum
Answer: b) Ventricles
Which chamber of the heart receives oxygenated blood from the lungs?
a) Right atrium
b) Left atrium
c) Right ventricle
d) Left ventricle
Answer: b) Left atrium
The contraction phase of the cardiac cycle is known as:
a) Diastole
b) Systole
c) Tachycardia
d) Bradycardia
Answer: b) Systole
What is the purpose of valves in the circulatory system?
a) To regulate blood pressure
b) To prevent the backflow of blood
c) To produce red blood cells
d) To transport oxygen
Answer: b) To prevent the backflow of blood
The circulation of blood between the heart and lungs is known as:
a) Systemic circulation
b) Pulmonary circulation
c) Coronary circulation
d) Renal circulation
Answer: b) Pulmonary circulation
Which of the following blood vessels carries oxygenated blood?
a) Pulmonary artery
b) Pulmonary vein
c) Aorta
d) Inferior vena cava
Answer: b) Pulmonary vein
What is the function of platelets in the blood?
a) Carry oxygen
b) Fight infections
c) Clot blood
d) Transport nutrients
Answer: c) Clot blood
The medical term for high blood pressure is:
a) Hypotension
b) Hypertension
c) Tachycardia
d) Bradycardia
Answer: b) Hypertension
Which of the following is not a component of the lymphatic system?
a) Lymph nodes
b) Lymphatic vessels
c) Spleen
d) Pancreas
Answer: d) Pancreas
Blood is returned to the heart from the body by the:
a) Pulmonary veins
b) Inferior vena cava
c) Aorta
d) Pulmonary artery
Answer: b) Inferior vena cava
The process by which white blood cells engulf and destroy pathogens is called:
a) Coagulation
b) Hemostasis
c) Phagocytosis
d) Diapedesis
Answer: c) Phagocytosis
The average adult human body contains approximately how many liters of blood?
a) 2-3 liters
b) 4-5 liters
c) 6-7 liters
d) 8-9 liters
Answer: b) 4-5 liters
Which of the following is not a major type of blood vessel?
a) Artery
b) Vein
c) Lymphatic vessel
d) Capillary
Answer: c) Lymphatic vessel
Which of the following is not a function of the lymphatic system?
a) Absorption of dietary fats
b) Immune defense
c) Regulation of blood pressure
d) Fluid balance
Answer: c) Regulation of blood pressure
What is the purpose of hemoglobin in red blood cells?
a) Transport oxygen
b) Fight infections
c) Clot blood
d) Remove carbon dioxide
Answer: a) Transport oxygen
The superior vena cava returns blood to the heart from the:
a) Lower body
b) Upper body
c) Lungs
d) Liver
Answer: b) Upper body
Blood leaving the right ventricle of the heart travels to the:
a) Lungs
b) Body tissues
c) Liver
d) Brain
Answer: a) Lungs
Which of the following is not a component of the cardiovascular system?
a) Heart
b) Blood vessels
c) Lungs
d) Lymph nodes
Answer: d) Lymph nodes
The heart’s electrical impulse originates in the:
a) Atria
b) Ventricles
c) Sinoatrial (SA) node
d) Atrioventricular (AV) node
Answer: c) Sinoatrial (SA) node
What is the function of the coronary arteries?
a) Carry blood away from the heart
b) Carry blood to the lungs
c) Supply oxygen and nutrients to the heart muscle
d) Drain deoxygenated blood from the heart
Answer: c) Supply oxygen and nutrients to the heart muscle
Which of the following is a symptom of poor circulation?
a) Increased heart rate
b) Hypertension
c) Cold extremities
d) Dizziness
Answer: c) Cold extremities
The exchange of oxygen and carbon dioxide between the blood and tissues occurs in the:
a) Arteries
b) Veins
c) Capillaries
d) Lungs
Answer: c) Capillaries
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