#1
Which chamber of the heart receives deoxygenated blood from the body?
Right atrium
ExplanationReceives deoxygenated blood from the body
#2
Which valve prevents the backflow of blood from the right ventricle into the right atrium?
Tricuspid valve
ExplanationPrevents backflow into the right atrium
#3
Which blood vessel carries oxygenated blood away from the heart to the rest of the body?
Aorta
ExplanationCarries oxygenated blood away from heart
#4
What is the function of the septum in the heart?
To separate the atria from the ventricles
ExplanationSeparates atria from ventricles
#5
Which of the following statements about the right side of the heart is true?
It receives deoxygenated blood from the lungs
ExplanationReceives deoxygenated blood from the lungs
#6
What is the role of the papillary muscles in the heart?
To anchor the heart valves and prevent them from inverting
ExplanationAnchors heart valves
#7
The coronary arteries are responsible for supplying blood to which part of the heart?
Muscular walls of the ventricles
ExplanationSupply blood to ventricular walls
#8
Which of the following is NOT a layer of the heart wall?
Pericardium
ExplanationNot a part of heart wall layers
#9
Which part of the conduction system in the heart is responsible for initiating the heartbeat?
Sinoatrial (SA) node
ExplanationInitiates heartbeat
#10
What happens during ventricular systole?
The ventricles contract and pump blood out of the heart
ExplanationVentricles contract, pumping blood
#11
Which artery supplies blood to the right atrium and sinoatrial (SA) node?
Right coronary artery
ExplanationSupplies blood to right atrium and SA node
#12
During which phase of the cardiac cycle does ventricular filling occur?
Ventricular diastole
ExplanationVentricles fill during diastole
#13
The 'Lub-Dub' sound of the heartbeat is associated with which event?
Closure of the heart valves
ExplanationAssociated with valve closure
#14
What is the approximate resting heart rate of an average adult?
60-80 beats per minute
ExplanationApproximate adult resting heart rate
#15
What is the function of the chordae tendineae?
To anchor the heart valves and prevent them from inverting
ExplanationAnchors heart valves
#16
What is the term for the relaxation phase of the cardiac cycle?
Ventricular diastole
ExplanationRelaxation phase
#17
Which of the following hormones is NOT involved in regulating heart function?
Insulin
ExplanationNot involved in heart regulation