Which of the following is a common reaction of the autonomic nervous system during stress?

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During stress, the autonomic nervous system triggers a 'fight or flight' response, preparing the body to respond to perceived danger or challenges. One of the most significant reactions during this response is the elevation of heart rate. Increased heart rate serves to enhance blood flow to vital organs and muscles, equipping the body to either confront the threat or flee from it. This physiological change helps to improve oxygen delivery, energy mobilization, and reaction times, all of which are crucial during stressful situations.

The other choices either depict normal or counterproductive responses to stress. Decreased heart rate would indicate a state of calm rather than a stress response, normal blood pressure suggests a lack of stress, and reduced perspiration is not consistent with the body's typical reaction, as sweating often increases to help cool the body under stress. Thus, elevated heart rate accurately reflects a common and critical autonomic reaction to stress.

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