Cardiac cycle — Flashcards

During rapid ventricular filling, the left ventricular pressure becomes less than the left atrial pressure and the _____ valve opens

During systole, is there relatively constant blood flow in the left ventricle's coronary arteries? _____

After myosin binds a new ATP molecule in muscle contraction, hydrolysis of the new ATP molecule to ADP allows the myosin head to adopt a(n) _____ position, ready for a new contraction cycle

The effects of the autonomic nervous system on conduction velocity are called _____ effects

Phase 4 of the SA node action potential is characterized by _____

When the left ventricle contracts, the left ventricular pressure becomes greater than left atrial pressure and the _____ valve closes

Phase 1 of the myocardial action potential is caused by inactivation of voltage-gated _____ channels and opening of voltage-gated _____ channels

The heart sound S1 is due to _____ and _____ valve closure

_____ is the third phase of a cardiac cycle and represents the period between aortic valve closing and mitral valve opening

_____ is the second phase of a cardiac cycle and represents the period between aortic valve opening and closing