The following list shows the parts of the heart that regulate the heartbeat. 1 sinoatrial node (SAN) 2 atrioventricular node (AVN) 3 Purkyne tissue Which row correctly shows atrial contraction and ventricular contraction?
- AAtrial contraction: AVN produces wave of excitation; Ventricular contraction: SAN produces wave of excitation
- BAtrial contraction: Purkyne tissue carries wave of excitation; Ventricular contraction: AVN produces wave of excitation
- CAtrial contraction: SAN and AVN node produce wave of excitation; Ventricular contraction: Purkyne tissue carries the wave of excitation
- DAtrial contraction: SAN produces wave of excitation; Ventricular contraction: Purkyne tissue carries wave of excitation