Normal people's body temperature is relatively constant, and it maintains the dynamic balance of heat production and heat dissipation through the role of body temperature regulation centers in the brain and hypothalamus, regulation and neurohumors. Under normal physiological conditions, when the body temperature rises, the body keeps the body temperature relatively constant by reducing heat production and increasing heat dissipation; On the contrary, when the body temperature drops, the heat production increases and the heat dissipation decreases, so that the body temperature is maintained at a normal level.
Extended data:
influencing factor
1, gender factor
Generally speaking, women are slightly higher than men, slightly higher in premenstrual period and early pregnancy, and the ovulation period is lower. This fluctuation is mainly related to the progesterone secretion cycle, and the higher body fat of women than that of men should also be a reason.
2. Age factor
Neonatal body temperature is easily affected by external temperature and changes. Because the newborn's central nervous system is underdeveloped, the skin sweat glands are underdeveloped, and the body temperature regulation function is poor, which is easy to fluctuate. Children have a high metabolic rate and their body temperature can be slightly higher than that of adults. The elderly have low body temperature because of their low metabolic rate.
3. Day and night factors
Generally, the body temperature is the lowest at 2-5 a.m. and the highest at 5-7 p.m., and its variation range is about 0.5-65438 0℃. This regular fluctuation of day and night is due to the corresponding periodic changes in people's long-term lifestyles such as activity, metabolism and blood circulation. However, people who have been engaged in night work for a long time have periodic fluctuations in body temperature, which rises at night and drops during the day.
Baidu encyclopedia-normal body temperature