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What happens when the pacemaker becomes nonfunctional ?
Option: 1
Only auricles contract rhythmically
Option: 2
Only ventricles contract rhythmically
Option: 3
Cardiac muscles do not undergo co-ordinated rhythmic movements
Option: 4
Auricles and ventricles contract rhythmically
Answers (1)
atrial systole -
The semilunar valves are closed at this stage.
- wherein
The SAN now generates an action potential which stimulates both the atria to undergo a simultaneous contraction – the atrial systole.
Correct option is 3
View full answer
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