What would be a possible consequence of the SA node failing to depolarise? A. the entire heart would not contract B. the heart rate will decrease C. the ventricles would not contract D. the heart rate will increase
Option B. The sino-atrial node contains cells on the way to depolarise at a faster rate than others withinside the heart. If it fails, these other places will depolarise, however their rate can be slower than that of the sino-atrial node.
