Which two parts of the heart rely on an electrical impulse to ensure their contraction and resting phases are coordinated together?%0D%0A%0D%0A(1 point)%0D%0AResponses%0D%0A%0D%0Aatria and ventricle%0D%0A%0D%0Aatria and ventricle%0D%0A%0D%0Asuperior vena cava and inferior vena cava%0D%0A%0D%0Asuperior vena cava and inferior vena cava%0D%0A%0D%0Apulmonary vein and artery%0D%0A%0D%0Apulmonary vein and artery%0D%0A%0D%0Abicuspid and tricuspid valve