#1
Which of the following is NOT a component of the cardiovascular system?
Kidneys
ExplanationKidneys are part of the urinary system, not the cardiovascular system.
#2
What is the primary function of the heart in the cardiovascular system?
To pump blood
ExplanationThe heart pumps blood to circulate oxygen and nutrients throughout the body.
#3
Which chamber of the heart pumps oxygenated blood to the rest of the body?
Left ventricle
ExplanationThe left ventricle pumps oxygenated blood to the body through the aorta.
#4
Which blood vessels have valves to prevent backflow of blood?
Veins
ExplanationVeins have valves that prevent the backflow of blood and ensure one-way flow toward the heart.
#5
Which of the following is NOT a type of blood vessel?
Ventricle
ExplanationVentricle is a chamber of the heart, not a type of blood vessel.
#6
Which of the following is a symptom of a heart attack?
Sweating
ExplanationSweating can be a symptom of a heart attack, along with chest pain and shortness of breath.
#7
Which blood vessel carries deoxygenated blood back to the heart from the body?
Vena cava
ExplanationThe vena cava carries deoxygenated blood from the body back to the heart.
#8
Which of the following blood vessels carries oxygenated blood away from the heart?
Aorta
ExplanationThe aorta carries oxygenated blood from the heart to the rest of the body.
#9
What is the average adult human heart rate at rest?
70-80 beats per minute
ExplanationThe average adult human heart rate at rest is 70-80 beats per minute.
#10
What is the role of the sinoatrial (SA) node in the heart?
It initiates the heartbeat
ExplanationThe SA node initiates the electrical impulse that starts each heartbeat.
#11
What is the medical term for a heart attack?
Myocardial infarction
ExplanationA myocardial infarction occurs when blood flow to a part of the heart is blocked.
#12
What is the function of hemoglobin in the cardiovascular system?
To carry oxygen
ExplanationHemoglobin binds with oxygen in the lungs and carries it to tissues throughout the body.
#13
What is the medical term for high blood pressure?
Hypertension
ExplanationHypertension is the medical term for high blood pressure, a risk factor for cardiovascular disease.
#14
What is the term for the contraction phase of the cardiac cycle?
Systole
ExplanationSystole is the phase of the cardiac cycle when the heart contracts to pump blood.
#15
Which of the following is NOT a risk factor for cardiovascular disease?
Regular exercise
ExplanationRegular exercise is beneficial and reduces the risk of cardiovascular disease.
#16
What is the term for the condition where the walls of the arteries become thickened and hardened?
Atherosclerosis
ExplanationAtherosclerosis is the condition where artery walls thicken and harden due to plaque buildup.
#17
Which of the following is a major risk factor for developing atherosclerosis?
Smoking
ExplanationSmoking is a major risk factor for atherosclerosis and cardiovascular disease.
#18
Which of the following is a symptom of heart failure?
Weight gain
ExplanationWeight gain can be a symptom of heart failure due to fluid retention.