Which of the following components of blood contains hemoglobin?
  • Myocardium
  • stroke volume (SV)
  • T-Wave
  • a) Erythocytes
If an increase in end-diastolic volume (EDV) occurs, the force of ventricular contraction rises. This will produce an increase in which of the following?
  • deoxygenated, pulmonary arteries
  • isovolumetric contraction (phase 2)
  • Cardiac muscle has neurogenic contractile ability.
  • Cardiac output and stroke volume
During the initial period of pacemaker potential from spontaneous depolarization to subthreshold, which channels are open?
  • Funny Channels
  • The regulation of the cardiovascular system does not depend on interactions with any other organ or systems.
  • a) Erythocytes
  • Myocardium
Which of the following components of the electrocardiogram (ECG) is an upward deflection caused by ventricular repolarization and is correlated with phase 3 of the ventricular contractile cell action potential?
  • AV node
  • Myocardium
  • T-Wave
  • a) Erythocytes
At the beginning of systole, when ventricular pressure exceeds atrial pressure, the AV valves close and the semilunar valves also remain closed because the pressure within the ventricles is still not sufficiently strong to force them open. At this point there is no flow of blood in or out of the ventricles. This phase is known as ___________.
  • deoxygenated, pulmonary arteries
  • Cardiac muscle has neurogenic contractile ability.
  • isovolumetric contraction (phase 2)
  • Cardiac output and stroke volume
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