_________ blood flow causes heart sounds when the valves close
These valves are open during the Ventricular filling phase
When the muscles of the chamber are contracted
The volume of blood coming into each atria per minute
During ventricular filling, atrial pressure and ventricular pressure are about _________
The occurs when the aortic and pulmonary valves close
Since the _______ period of cardiac muscle is longer than that of skeletal muscle, cardiac muscle does not go into tetanus, or sustained muscle contraction
This the largest amount of blood in the ventricle during the cardiac cycle
Sympathetic activity __________ venous return and strength of cardiac contraction
These valves open at the start of the ventricular ejection phase
During the ventricular ________ phase, the left ventricular and the aortic pressures are the same
_________ is determined by heart rate and stroke volume
Down
__________completes ventriculur filling
Ventricular _________ occurs with the AV valve open
The amount of blood left in the ventricle at the end of ventricular systole
During the isovolumetric phase, blood volume in the ventricle is ____________
This averages about 70 ml per beat at rest
All the valves of the heart are _________
Contraction phase in which all valves are closed
Atrial _________ delivers that last 20% of blood into the ventricle
These receptors are always excitatory
When the muscles of the chamber are relaxed
Heart rate is determined primarily by ____________ influences on the SA node
Within physiological limits, the more diastolic filling the more the cardiac muscle is __________ and the harder it contracts.
The AV valve is forced open when ventricular ________________ drops below atrial ___________
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