Chapter 19

Most of the ventricle ejections occurs ?

• when the AV valve is closed

• during ventricular systole

• during atrial diastole

• during isovolumetric contraction

Which of the following belong to the systemic circuit?

• Aorta and venae cavae

• Aorta and pulmonary veins

• Pulmonary arteries and venae cavae

• Pulmonary arteries and pulmonary veins

The repolarization of an action potential is a result of ?

• Na+ inflow

• Na+ outflow

• K+ inflow

• K+ outflow

Which part of the heart is the pericardium in direction contact with?

• pericardial cavity

• endocardium

• myocardium

• epicardium

What part of the heart doe the papillary muscles help to anchor into the ventricles?

• papillary muscles

• pectinate muscles

• trabeculae carnae

• chordae tendinae (tendinous cords)