View the animation below, then complete the quiz to test your knowledge of the concept.

1	During which phase of the cardiac cycle does aortic pressure reach its maximum?
	A)	ventricular ejection.
	B)	ventricular filling.
	C)	isovolumetric – ventricles contract.
	D)	isovolumetric – ventricles relax.
	E)	both C and D.
2	During which complete phase of the cardiac cycle do the atria both relax and contract?
	A)	ventricular ejection.
	B)	ventricular filling.
	C)	isovolumetric – ventricles contract.
	D)	isovolumetric – ventricles relax.
	E)	both C and D.
3	During which complete phase of the cardiac cycle do both the atria and ventricles relax?
	A)	ventricular ejection.
	B)	ventricular filling.
	C)	isovolumetric – ventricles contract.
	D)	isovolumetric – ventricles relax.
	E)	both C and D.
4	The audible heart sounds are caused by the contraction of the atria and ventricles.
	A)	True
	B)	False
5	The P wave of the ECG coincides with ventricular filling.
	A)	True
	B)	False