| 词汇 | sympathetic-nervous-system |
| 释义 | sympathetic nervous system noun[ Cusually singular ] anatomy specializeduk /sɪm.pəˌθet.ɪk ˈnɜː.vəs ˌsɪs.təm/ us /sɪm.pəˌθet̬.ɪk ˈnɝː.vəs ˌsɪs.təm/ the part of the nervous system that prepares the body to react in emergency situations, such as by making the heart beat faster: Stimulants such as caffeine activate our sympathetic nervous system, the fight or flight mechanism. When we exercise strenuously, we activate our sympathetic nervous system. Sweating, which is regulated by what's called the sympathetic nervous system, is the body's way of regulating its temperature. The symptoms are all associated with overstimulation of the sympathetic nervous system, which accelerates heart rate, constricts blood vessels, and raises blood pressure. Stress activates the sympathetic nervous system, which can stimulate colon spasms, resulting in abdominal discomfort. The brain & nervous system abducens nerve abducent nerve accessory nerve alexithymia allism glossopharyngeal nerve grey matter hemispheric hemispherical hindbrain neurofibrillary neurogenic neurogenically neuroglia neuroglial reinnervation reticular formation rhinencephalon rhombencephalon right brain Compareparasympathetic nervous system |
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