Central Nervous System (CNS) Brain Spinal Cord Peripheral Nervous System (PNS) Sensory Neurons Motor Neurons Somatic Nervous System voluntary movements.

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Central Nervous System (CNS) Brain Spinal Cord Peripheral Nervous System (PNS) Sensory Neurons Motor Neurons Somatic Nervous System voluntary movements via skeletal muscles Somatic Nervous System voluntary movements via skeletal muscles Autonomic Nervous System organs, smooth muscles Autonomic Nervous System organs, smooth muscles Sympathetic - “Fight-or-Flight” responses Sympathetic - “Fight-or-Flight” responses Parasympathetic - maintenance Parasympathetic - maintenance The Nervous System

A junction where the axon or some other portion of one cell (= presynaptic cell) terminates on the dendrites, soma, or axon of another neuron (post synaptic cell). The term was introduced in nineteenth century by the British neurophysiologist Charles Sherrington

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