1. Which statement describes the condition of the heart at the point indicated in the electrocardiogram?
a The atria are contracting and pushing blood into the bottom ventricles of the heart.
b The ventricles are contracting and pushing blood out of the heart to the lungs and body.
c The valves between the atria and ventricles close, producing the second heartbeat.
d The valves of the aorta and pulmonary artery close, producing the second heartbeat.
2. Which statement describes the condition of the heart at the point indicated in the electrocardiogram?
a The muscles of the atria depolarize.
b The muscles of the ventricles depolarize.
c The muscles of the atria repolarize.
d The muscles of the ventricles repolarize. freeslots dinogame telegram营销
- Attachment 1
- Attachment 2
