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Sketch the graph of the function .
Neurotransmitters
Chemical substances released at the end of a nerve fiber by the arrival of a nerve impulse and, by diffusing across the synapse or junction, cause the transfer of the impulse to another nerve fiber, a muscle fiber, or some other structure.
Acetylcholine
One of the major neurotransmitters of the autonomic nervous system.
Norepinephrine
A neurotransmitter and hormone involved in the body's fight or flight response, affecting mood, focus, and alertness.
Neuroendocrine System
Those endocrine glands that are controlled by and interact with the nervous system.
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