The statements list some of the events in the cardiac cycle. They are not in the correct order.
1 The impulse travels through Purkyne tissue.
2 A wave of excitation sweeps across the atria.
3 The atrioventricular node delays the impulse for a fraction of a second.
4 The sinoatrial node contracts.
5 The wave of excitation sweeps upwards from the base of the ventricles.
6 The ventricles contract.
7 The atria contract.
Which statement describes the third of these events to occur in the cardiac cycle?
1 )
1
2 )
3
3 )
4
7
تحلیل ویدئویی تست
منتظریم اولین نفر تحلیلش کنه!
