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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.

The correct answer is option A.  

Explanation:

An electrocardiogram or ECG is a test that helps in measuring and representing the electrical activity of the heartbeat on a graph. A wave or electrical impulse runs through the heart with each beat that leads to the muscles to squeeze and pumps the blood from chambers of the heart.

The point that is indicated in the graph is P wave which describes the depolarization of the muscles of the atria which results in the contraction of the atrial muscles or atrial systole.

Thus, the correct answer is option A.

because they equal life

explanation:

my hamster died and my second hamster i got after that one died as well. i also lost two birds named rainbow and kiwi, (they didn't die, they flew off and escaped). i lost a cat named omi, and a dog named snoopie. the best way i got over it is, paying my respects, and just thinking that they were in a happy place. as well as just remembering but not thinking about it all the time, just do fun activities and try not to think about it too much. hope you feel better. i'm sorry about your loss. : (