| 单词 | sympathetic system |
| 释义 | sympathetic system The parasympathetic nervous system cancels out the sympathetic system with its calming effect. The Sun The investigation of the pharmacology of epinephrine made a major contribution to the understanding of the autonomic system and the function of the sympathetic system. Retrieved from Wikipedia CC BY-SA 3.0 There are two kinds of neurons involved in the transmission of any signal through the sympathetic system: pre- and post-ganglionic. Retrieved from Wikipedia CC BY-SA 3.0 Upon increase in carbon dioxide level at central chemoreceptors, it stimulates the sympathetic system to constrict vessels. Retrieved from Wikipedia CC BY-SA 3.0 Loss of sympathetic system input to the blood vessels causes them to get larger (vasodilation) which has the effect of lowering blood pressure. Retrieved from Wikipedia CC BY-SA 3.0 |
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