write my assignment 6168

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.

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