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An action potential occurs when a neuron sends information down an axon away from the body. In response to a signal, the soma end of the axon becomes depolarized. The depolarization spreads through the axon and the first part of the neuron repolarizes. Once the NA+ channels are inactivated and K+ channels are open, the membrane cannot depolarize again. Then the action potential continues to travel down the axon.
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How it impacts my life:
Neurotransmitters:
Acetylcholine
Enables muscle action, learning, and memory.
Whenever I eat eggs for breakfast, which are high in choline, my body produces acetylcholine.
Dopamine
Influences movement, attention, emotion, and satisfaction
When I eat icecream, it releases dopamine because my brain intreprets it as pleasure.
Mood regulatino, hunger, sleep, and arousal
Serotonin
During the summer when I lay out in the sun, my body releases serotonin.
When I watch a scary movie and get scared, my body releases norepinephrine. My fight or flight response is triggered.
Norepinephrine
Helps control alertness and arousal
Endorphins
Enable us to handle pain and emotion
Whenever I go for a jog, my body releases endorphins.