- 交感神经 jiāogǎnshénjīng sympathetic nervous systemPart of the autonomic nervous system that regulates internal organs and involuntary functions like heart rate and blood pressure; it works in opposition to the [[副交感神经|副交感神經|fu4 jiao1 gan3 shen2 jing1]]
- 副交感神经 fùjiāogǎnshénjīng parasympathetic nervous systemthe part of the autonomic nervous system that slows the heart rate and relaxes muscles, operating in opposition to the sympathetic nervous system
- 交感作用 jiāogǎnzuòyòng sympathetic actionthe process by which one system or organ responds to a change in another, as in physical adaptation or sympathetic nerve function