The mechanism for these risks appears to lie in the biology of the stress-responsesystem and in the way environment affects a person's genetic activity.
患病风险高于常人的机理似乎来源于压力——反馈系统的生物学原理以及环境对人基因活动的影响。
2
The finding also shows that the brain could increase the activity of the sympathetic nerves, the part of the nervous system involved in stressresponse.
这些发现也显示，大脑能增加交感神经的活动，而交感神经是负责压力响应的神经系统。
3
The researchers, who detail their work in the August issue of the journal Archives of Surgery, suggest the personality type is linked with the body's immune system as well as stressresponsesystem.