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peripheral nervous system (PNS)
nervous system outside of brain and spinal cord; primarily nerves that extend from brain and spinal cord
autonomic nervous system
involuntary part of the peripheral nervous system; regulates glands, smooth muscles, and cardiac muscles
sympathetic nervous system
division of autonomic nervous system in charge of "fight or flight" response
parasympathetic nervous system
division of autonomic nervous system in charge of rest and rejuvenation
neuron that gathers sensory information such as taste, smell, touch, sight, hearing, pain, pressure, heat, or light
a neuron that carries messages between other neurons to process, integrate, think, and decide
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