#1
Which of the following is NOT a component of the cardiovascular system?
Liver
ExplanationLiver is not a part of the cardiovascular system.
#2
What is the average resting heart rate for adults?
70-80 beats per minute
ExplanationThe average resting heart rate for adults is 70-80 beats per minute.
#3
Which blood vessel carries oxygenated blood away from the heart?
Artery
ExplanationArteries carry oxygenated blood away from the heart.
#4
What is the primary function of red blood cells (erythrocytes)?
To transport oxygen
ExplanationRed blood cells primarily transport oxygen.
#5
What is the term for the volume of blood pumped by each ventricle per minute?
Cardiac output
ExplanationThe volume of blood pumped by each ventricle per minute is called cardiac output.
#6
Which of the following is NOT a risk factor for developing cardiovascular disease?
Regular exercise
ExplanationRegular exercise is not a risk factor for cardiovascular disease.
#7
What type of blood vessel has valves to prevent the backflow of blood?
Vein
ExplanationVeins have valves to prevent the backflow of blood.
#8
Which of the following factors does NOT affect blood pressure?
Bone density
ExplanationBone density does not affect blood pressure.
#9
What is the main function of the endothelium in blood vessels?
To form a smooth surface for blood flow
ExplanationThe endothelium in blood vessels forms a smooth surface for blood flow.
#10
Which of the following substances is NOT transported by blood?
Nitrogen
ExplanationNitrogen is not transported by blood.
#11
What is the name of the condition characterized by a narrowing of the blood vessels?
Atherosclerosis
ExplanationThe condition characterized by a narrowing of the blood vessels is called atherosclerosis.
#12
Which of the following hormones is primarily responsible for regulating blood pressure?
Aldosterone
ExplanationAldosterone is primarily responsible for regulating blood pressure.