Ventricular relaxation immediately follows ________.a. atrial depolarizationb. ventricular repolarizationc. ventricular depolarizationd. atrial repolarization

When the ventricles contract with more force this causes the _____ volume to be larger and the ____ volume to be smaller.   A end diastolic; stroke   B stroke; end systolic   C end systolic; end diastolic

In a normal heartbeat the atria contract ______.   A at exactly the same time as the ventricles   B immediately before the ventricles   C immediately after the ventricles   D at the very beginning of ventricular diastole

An electrocardiogram (ECG) measures the ____.   A difference in electrical potential between two points on the body   B force produced by the ventricles as they contract   C cardiac output   D amount of blood the ventricles eject in a single beat   E membrane potential at which voltage-gated channels will open

A likely effect of parasympathetic input to the heart would be to _____.     Open additional potassium channels in pacemaker cells     Promote calcium entry in pacemaker and contractile cells     There is no parasympathetic input to the heart     Decrease force of ventricular contraction

Blood flow through capillaries in the walls of the left ventricle is ______.   A unnecessary because the myocardiocytes in the wall of the left ventricle get plenty of O2 from the blood they pump   B greatest during diastole; these capillaries are squeezed shut during systole when the surrounding muscle cells contract   C greatest during systole; blood stops following through capillaries during diastole because the heart is relaxed

Pressure in the ventricle would be lowest during _____. atrial systole ventricular systole ventricular diastole isovolumetric relaxation diastisis

The second heart sound is heard as the ECG records the end of the ______.   A P wave.   B P-R interval.   C QRS wave.   D T wave.   E S-T segment. is the answer D?

The volume of blood ejected from the left ventricle in each beat is ______ the volume ejected by the right ventricle.   A greater than   B equal to   C less than

At the time point indicated on the ECG the ____.   A atria and ventricles would both be relaxed   B atria and ventricles would both be contracting   C atria would be relaxed and ventricles would be contracting   D ventricles would be relaxed and atria would be contracting