Study

I love my heart

  •   0%
  •  0     0     0

      Back   Restart
  • Which ion plays a major role in the plateau phase of the cardiac action potential?
    Calcium (Ca²⁺)
  • During which phase of the action potential do cardiac muscle cells contract?
    Depolarization
  • What is the name of the outermost layer of the heart wall?
    Epicardium
  • Blood vessel supplies oxygenated blood to the heart muscle itself?
    Coronary artery
  • Which heart sound ("lub-dub") corresponds to closure of the semilunar valves?
    The second heart sound (S2)
  • Which chamber of the heart receives deoxygenated blood from the body?
    Right atrium
  • What happens if the sinoatrial (SA) node fails to function properly?
    The atrioventricular (AV) node may take over as the pacemaker
  • This valve is located between the right atrium and right ventricle.
    Tricuspid valve
  • Which part of the heart generates electrical impulses to initiate contraction?
    SA node
  • What is the Frank-Starling law of the heart?
    Increased stretch of cardiac muscle leads to stronger contraction
  • What effect does sympathetic nervous system stimulation have on the heart?
    Increases heart rate and force of contraction
  • What is the function of the mitral valve?
    Prevents backflow from left ventricle to left atrium
  • What is the primary function of the right ventricle?
    Pumps blood to the lungs via pulmonary artery
  • What primarily determines cardiac output (CO)?
    Stroke volume and heart rate
  • During which phase of the cardiac cycle do the ventricles fill with blood?
    Ventricular diastole
    • Your experience on this site will be improved by allowing cookies.