当人们从平原进入高原地区时,一般人需要2~3个月时间慢慢适应当地的低氧环境,才能在这种环境下生存,并进行正常或接近正常的脑力及体力活动。如果人不能适应高山低氧环境,则要发生高山病,如高原性心脏病、高原性细胞增多症、高原性高血压或高原性低血压等。长期居住在高原的人,机体能渐渐适应高原地区的特殊气候条件,在神经体液的调节下机体各部机能会产生相应的变化。其中,呼吸系统和循 When people enter the plateau from the plain, most people need 2 to 3 months to slowly adapt to the local hypoxic environment in order to survive in this environment, and normal or near normal mental and physical activity. If people can not adapt to the alpine hypoxic environment, then to occur mountain sickness, such as heart disease, altitude sickness, high altitude or high altitude hypotension. Long-term living in the plateau, the body can gradually adapt to the special climatic conditions in the plateau region, under the regulation of the nervous fluid body parts will produce the corresponding changes in function. Among them, the respiratory system and circulation