Q:

The potential differences generated by the heart muscle as it contracts and relaxes can be measured by placing electrodes on the surface of the body. What is the record of these electrical events correctly called?

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The potential differences generated by the heart muscle as it contracts and relaxes can be measured by placing electrodes on the surface of the body. What is the record of these electrical events correctly called?


  1. An electrocardiogram
  2. limb lead II
  3. An electrocardiograph
  4. An EEG

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A: An electrocardiogram (ECG) is produced by an electrocardiograph machine. 

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