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Why did the Articles of Confederation fail?
Endorphins
Natural, pain-relieving chemicals produced by the body that promote a sense of well-being and can diminish the perception of pain.
Acetylcholine
A neurotransmitter in the central and peripheral nervous system that plays a key role in muscle activation and cognitive functions.
Dopamine
A neurotransmitter involved in the regulation of movement, attention, learning, reward, and emotional responses in the brain.
Motor Neuron
A type of neuron that sends impulses from the central nervous system to muscles or glands, initiating movement or action.
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