#1
Which chamber of the heart receives oxygenated blood from the lungs?
#2
Which structure conducts the electrical impulses from the atria to the ventricles?
#3
What effect does the parasympathetic nervous system have on heart rate?
#4
Which of the following structures prevents backflow of blood from the aorta into the left ventricle?
#5
Which of the following valves prevents the backflow of blood from the pulmonary trunk into the right ventricle?
#6
Which of the following is responsible for the initiation of the cardiac action potential in the heart?
#7
What is the term for the amount of blood ejected by the ventricle in one contraction?
#8
During which phase of the cardiac cycle does ventricular filling occur?
#9
What is the term for the volume of blood pumped out by each ventricle of the heart in one minute?
#10
Which of the following hormones increases heart rate and contractility?
#11
Which of the following factors can increase preload, leading to an increase in stroke volume?
#12
Which of the following represents the correct sequence of events in the cardiac cycle?
#13
Which of the following ions plays a crucial role in the depolarization phase of cardiac action potential?
#14
What is the term for the phase in the cardiac cycle when the atria are contracting and the ventricles are relaxed?
#15
What is the term for the phase of the cardiac cycle when the ventricles are in a state of contraction and all valves are closed?
#16
Which of the following factors can decrease afterload?
#17