| Question |
Answer |
| Acetylcholine |
controls skeletal muscle actions |
| Norepinephrine |
Creates a sense of wellbeing; low levels of depression |
| Dopamine |
sense of wellbeing; deficiency in some brain areas |
| Serotonin |
Primary inhibitory; sleepiness |
| Histamine |
release in hypothalamus promotes alertness |
| GABA |
generally inhibitory |
| Glutamate |
generally excitatory |
| Enkephalin, endorphins |
generally inhibitory; reduce pain by inhibiting substance P release |
| Substance P |
excitatory; pain perception |
| Nitric Acid |
Play role in memory. |