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Explain how the somatic nervous system differs from the autonomic nervous system. What are the sympathetic and parasympathetic systems?
The somatic nervous system responds to the external environment, includes both voluntary (like picking up a pencil) and involuntary (reflex like pulling back hand from stove) responses. The autonomic nervous system responds to and controls internal, involuntary functions (like heart rate, blood pressure, etc). Para & sym are part of the autonomic that cause (respectively) the body to go into a relaxed state (ACh) or an aroused state (NE)