Human body is when life is huffish, but excited sympathetic system, make its end releases armour adrenalin, at the same time adrenal medullary also excessive secretes adrenalin.

• 人体在生气发怒时，可兴奋交感神经系统，使其末梢释放出大量去甲肾上腺素，同时肾上腺髓质也过量分泌肾上腺素。