MCQ
In the heart, as the action potential reaches the $AV$ node from the $SA$ node, there is a delay of the action potential. This delay is important because:
- AIt allows atria to rest.
- BIt allows a stronger right atrial contraction.
- ✓It allows ventricles to receive all the blood from the atria.
- DIt allows right atria to receive the blood from vena cava