#1
Which of the following is NOT a component of the cardiovascular system?
Kidneys
ExplanationKidneys are part of the renal system, not the cardiovascular system.
#2
What is the main function of red blood cells (erythrocytes)?
Transport oxygen
ExplanationRed blood cells carry oxygen from the lungs to the rest of the body.
#3
Which of the following is NOT a type of blood vessel?
Alveolus
ExplanationAlveolus is a small air sac in the lungs, not a blood vessel.
#4
Which of the following is a function of the cardiovascular system?
Transporting nutrients
ExplanationThe cardiovascular system transports oxygen, nutrients, and hormones throughout the body.
#5
Which of the following is the main function of the cardiovascular system?
Transporting nutrients and oxygen
ExplanationThe cardiovascular system primarily transports oxygen, nutrients, and hormones.
#6
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle pumps oxygen-rich blood to the body.
#7
What is the name of the large artery that carries blood away from the heart?
Aorta
ExplanationThe aorta is the main artery carrying blood from the heart to the body.
#8
Which blood vessels carry oxygenated blood from the lungs to the heart?
Pulmonary arteries
ExplanationPulmonary arteries carry oxygenated blood from the lungs to the heart.
#9
What is the term for the force exerted by circulating blood against the walls of blood vessels?
Blood pressure
ExplanationBlood pressure is the pressure of blood against the walls of arteries.
#10
Which of the following is a condition characterized by irregular heartbeat?
Arrhythmia
ExplanationArrhythmia is an abnormal heart rhythm.
#11
Which of the following is a major risk factor for cardiovascular disease?
High blood pressure
ExplanationHigh blood pressure increases the risk of heart disease and stroke.
#12
What is the name of the condition characterized by the accumulation of plaque in the arteries?
Atherosclerosis
ExplanationAtherosclerosis is the hardening and narrowing of arteries due to plaque buildup.
#13
What is the name of the condition where the arteries in the heart become narrowed due to a buildup of plaque?
Coronary artery disease
ExplanationCoronary artery disease occurs when plaque builds up in the coronary arteries.
#14
Which of the following factors contributes to the development of atherosclerosis?
Smoking
ExplanationSmoking contributes to the buildup of plaque in the arteries, leading to atherosclerosis.
#15
What is the name of the condition characterized by an abnormal enlargement of the heart?
Cardiomegaly
ExplanationCardiomegaly refers to abnormal enlargement of the heart.