Where should the left ventricle send blood?
  • Inferior
  • Lungs
  • aorta
  • Veins
Which of the following events will immediately follow the phase of the cardiac cycle: End Systolic volume
  • The atrioventricular valves openThis is the isovolumetric relaxation phase. During the next phase, the ventricular filling phase, the ventricles are in diastole and atrial systole occurs.
  • involve calcium voltage-gated channelsThe plateau phase of the cardiac action potential is due to the opening of calcium ions channels.
  • papillary muscles
  • ventriclesThe second heart sound is caused by the closing of the semilunar valves, which happens shortly after ventricular systole is over.
What surface groove separates the right and left ventricles?
  • stroke volume (SV) and heart rate (HR)
  • Interventricular sulcus
  • pericardial fluid
  • vagus nerves (CN X - 10)
According to the Frank-Starling law, a bigger preload will result in.......
  • pulmonary trunkWhen the right ventricle contracts, blood passes through the pulmonary semilunar valve into the pulmonary trunk.
  • a stronger contractionA bigger preload means increased stretch of the ventricular muscle cells and therefore, a stronger contraction.
  • ventriclesThe second heart sound is caused by the closing of the semilunar valves, which happens shortly after ventricular systole is over.
  • involve calcium voltage-gated channelsThe plateau phase of the cardiac action potential is due to the opening of calcium ions channels.
The heart is located........
  • ventriclesThe second heart sound is caused by the closing of the semilunar valves, which happens shortly after ventricular systole is over.
  • left atriumOxygenated blood returning from the lungs via the pulmonary veins enters the left atrium.
  • in the mediastinumThe heart is situated slightly to the left side in the thoracic cavity in the mediastinum.
  • deoxygenated blood from the systemic circuit.
Which of the following is NOT a population of pacemaker cells in the heart?a. papillary musclesb. sinoatrial (SA) nodec. atrioventricular (AV) noded. Purkinje fiber system
  • pericardial fluid
  • fibrous pericardium
  • papillary muscles
  • pulmonary veins
The visceral pericardium is the same as the:
  • pulmonary veins
  • epicardium
  • pericardial fluid
  • Inferior
Which cranial nerves have a negative chronotropic effect on heart rate?
  • Interventricular sulcus
  • vagus nerves (CN X - 10)
  • sinoatrial (SA) node
  • fibrous pericardium
What vessel delivers oxygenated blood to systemic capillaries for gas exchange?
  • tetany
  • pulmonary veins
  • aorta
  • Veins
Stroke volume averages about:
  • sinoatrial (SA) node
  • fibrous pericardium
  • pulmonary veins
  • 70 ml per heart beat.
The apex of the heart is __________.
  • Veins
  • Inferior
  • epicardium
  • fibrous pericardium
Both the left anf right atria receive blood from
  • aorta
  • Inferior
  • Veins
  • tetany
The chambers that have just emptied when the second heart sound is heard are the .......
  • involve calcium voltage-gated channelsThe plateau phase of the cardiac action potential is due to the opening of calcium ions channels.
  • ventriclesThe second heart sound is caused by the closing of the semilunar valves, which happens shortly after ventricular systole is over.
  • The atrioventricular valves openThis is the isovolumetric relaxation phase. During the next phase, the ventricular filling phase, the ventricles are in diastole and atrial systole occurs.
  • left atriumOxygenated blood returning from the lungs via the pulmonary veins enters the left atrium.
Blood in the right atrium should travel next past the:
  • left atriumOxygenated blood returning from the lungs via the pulmonary veins enters the left atrium.
  • pulmonary trunkWhen the right ventricle contracts, blood passes through the pulmonary semilunar valve into the pulmonary trunk.
  • fibrous pericardium
  • tricuspid valve and into the right ventricle.
Unlike skeletal muscle action potentials, cardiac muscle action potentials __________.
  • The atrioventricular valves openThis is the isovolumetric relaxation phase. During the next phase, the ventricular filling phase, the ventricles are in diastole and atrial systole occurs.
  • pulmonary trunkWhen the right ventricle contracts, blood passes through the pulmonary semilunar valve into the pulmonary trunk.
  • ventriclesThe second heart sound is caused by the closing of the semilunar valves, which happens shortly after ventricular systole is over.
  • involve calcium voltage-gated channelsThe plateau phase of the cardiac action potential is due to the opening of calcium ions channels.
The length of the cardiac action potential, at 200-300 msec, is dependent upon the:
  • papillary muscles
  • pulmonary veins
  • fibrous pericardium
  • plateau phase.
What vessel(s) deliver oxygenated blood to the left atrium?
  • sinoatrial (SA) node
  • pericardial fluid
  • pulmonary veins
  • fibrous pericardium
As a result of the long refractory period in the contractile cell refractory period, cardiac muscle can NOT exhibit:
  • tetany
  • aorta
  • Veins
  • plateau phase.
What decreases heart rate
  • pulmonary veins
  • Acetylcholine
  • epicardium
  • sinoatrial (SA) node
Blood returning from the lungs enters the ......
  • pulmonary trunkWhen the right ventricle contracts, blood passes through the pulmonary semilunar valve into the pulmonary trunk.
  • in the mediastinumThe heart is situated slightly to the left side in the thoracic cavity in the mediastinum.
  • tricuspid valve and into the right ventricle.
  • left atriumOxygenated blood returning from the lungs via the pulmonary veins enters the left atrium.
0:0:1



Answered

Not Answered

Not Visited
Correct : 0
Incorrect : 0