#1
Which chamber of the heart pumps blood to the pulmonary circulation?
Right ventricle
ExplanationRight ventricle pumps blood to the lungs for oxygenation.
#2
What is the average resting heart rate for adults?
60-80 beats per minute
ExplanationNormal resting heart rate for adults is 60-80 beats per minute.
#3
Which blood vessel carries deoxygenated blood from the heart to the lungs?
Pulmonary artery
ExplanationPulmonary artery carries deoxygenated blood from the heart to the lungs.
#4
Which vessel returns blood to the right atrium of the heart from the lower body?
Inferior vena cava
ExplanationInferior vena cava returns blood to the right atrium from the lower body.
#5
What is the term for the smallest blood vessels in the body?
Capillaries
ExplanationCapillaries are the smallest blood vessels in the body.
#6
Which blood vessel carries oxygenated blood from the lungs to the heart?
Pulmonary vein
ExplanationPulmonary vein transports oxygenated blood from the lungs to the heart.
#7
What is the pacemaker of the heart called?
SA node
ExplanationSA node serves as the pacemaker, initiating the heart's electrical impulses.
#8
What is the function of the atrioventricular valves in the heart?
To prevent backflow of blood into the atria during ventricular contraction
ExplanationAV valves prevent blood backflow into atria during ventricular contraction.
#9
What is the term for the relaxation phase of the cardiac cycle?
Diastole
ExplanationDiastole is the relaxation phase of the cardiac cycle.
#10
What is the term for the volume of blood pumped out by each ventricle in one minute?
Cardiac output
ExplanationCardiac output is the volume of blood pumped by each ventricle in a minute.
#11
Which of the following factors contributes to peripheral resistance?
Blood viscosity
ExplanationBlood viscosity is a factor contributing to peripheral resistance.
#12
Which of the following is NOT a risk factor for cardiovascular disease?
Regular exercise
ExplanationRegular exercise is not a risk factor for cardiovascular disease.