The finding also shows that the brain could increase the activity of the sympathetic nerves, the part of the nervous system involved in stress response.
The parasympathetic nerves enhance both tone and motility, and relax sphincters .
The effects of vagal and sympathetic nerves on the transmembrane potentials of cardiac ventricular cells of toad were observed.
The physician inserts a needle and carefully guides it to the sympathetic nerves.
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