2. The pump or pressure-head for the systemic circulation is the:A. right atriumB. right ventricleC. left atriumD. left ventricle8. The volume of blood ejected by the heart per minute is termed:A. stroke volumeB. cardiac outputC. end diastolic volumeD. end systolic volume9. Right and Left Ventricular Pressures are the identical during:A. the period of ejectionB. the period of fillingC. systole12. During exercise, venous return is enhanced by:A. the operation of carotid arterial and femoral arterial valves.B. the operation of the respiratory muscle/ventilation pump.C. skeletal muscle pump operationD. Answers B and C are correct.14. The action potential in excitable cells is activated when the cell membrane reaches the membrane voltage referred to as:A. the graded potentialB. the peakC. thresholdD. the regressive augmentation.
The pump or pressure-head for the systemic circulation is the: right atrium B. right ventricle C. left atrium D. left ventricle 8.
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