| A | B |
|---|
| acetylcholine | Enables muscle action, learning, and memory. |
| serotonin | Affects mood, hunger, sleep, and arousal. |
| dopamine | Influences movement, learning, attention, and emotion |
| epinephrine | also known as adrenaline, plays an important role in your body's fight-or-flight response. |
| norepinephrine | controls alertness and arousal (awake) |
| GABA (gamma - aminobutyric acid) | relaxation; blocks impulses between nerve cells in the brain. |
| glutamate | excitatory neurotransmitter; plays a major role in learning and memory |
| endorphins | Diminishes the perception of pain and acts as a natural sedative (during and after exercise) |
| agonists | chemicals that bind to receptor sites and mimic the effects of a specific neurotransmitter. |
| antagonists | binds to the dendrites of a neuron and prevents or blocks its response |
