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单词 excitant
释义

excitant

/ˈɛksɪt(ə)nt / /ɪkˈsʌɪt(ə)nt / /ɛkˈsʌɪt(ə)nt/
noun Biology
A substance which elicits an active physiological or behavioural response: what happens when chemical excitants flood into the brain?...
  • Some people find that coffee brings out tremor; this is due to the presence of caffeine, which is an excitant; these effects are not, however, universal.
  • The resulting synaptic inhibition is characterized by either a depressant or an excitant effect, depending on the population of cells involved.
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更新时间:2025/3/23 14:01:55