A delivery driver nearly got into a car accident. After the incident, his heart starting to race and the driver also felt a rush of adrenaline. What systems interact with each other to cause this rush of adrenaline?

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the dna molecules have a negative charge because of the phosphate groups in their sugar-phosphate backbone, so they start moving through the matrix of the gel towards the positive pole. power is turned on and dna fragments migrate through gel (towards the positive electrode).

explanation: