What part of the autonomic nervous system increases its influence on the organs of a person when he is active?

In the case of human activity, the effect of sympathy on the body is enhanced – its effect contributes to an increase in the heart rate (pulse) value, acceleration of the intensity of metabolic processes (in particular, energy metabolism), which perfectly compensates the body’s needs during the period of activity. In addition, under the influence of sympathy, a double effect is realized – there is a release of adrenaline and counterinsular hormones, which makes it possible to supplement the response with a humoral factor.