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somatic nervous system
pertaining to the body, voluntary, excitatory, movement (muscle cell excitation)
autonomic nervous system
involuntary, unconscious, regulates activity of smooth muscle, cardiac muscle, and glands (visceral organs and blood vessels)
two subdivision of the autonomic nervous system
sympathetic and parasympathetic
sympathetic nervous system
fight or flight
parasympathetic nervous system
rest and digest
pre-ganglionic neurons
cell bodies in CNS
post-ganglionic neurons
have cell bodies in autonomic ganglia
sympathetic responses
fight or flight, emergency responses, NE, E, ACh, prepares body for intense physical activity, increased HR, increased blood glucose conc, increased blood flow to skeletal muscles, pupil dilation
parasympathetic responses
rest and digest, ACh, slowed HR, dilation of visceral organs, increased digestive activity
