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<span>The answer is The ability of the heart tissue to conduct electrical signals must be altered in order for the EKG to detect a problem. </span>In order for an EKG to detect a problem the electrical signals traveling through the heart muscle must be altered. If the electrical signal is abnormal it will show <span>up on the EKG graph, indicating a problem.</span>
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Answer:
Brain's 'Pleasure Chemical' Is Involved In Response . For years, the brain chemical dopamine has been thought of as the brain's "pleasure chemical," and studies have linked the addictive properties of drugs like cocaine to their effects on the dopamine system.
Explanation:
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