KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information.

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KEY CONCEPT The central nervous system interprets information, and the peripheral nervous system gathers and transmits information.

The nervous system’s two parts work together. The CNS includes the brain, brain stem, and spinal cord. The PNS includes four systems of nerves.

The CNS and PNS pass signals between one another. Sensory receptor generates impulse. PNS passes impulse to CNS. CNS interprets impulse. CNS passes impulse to PNS. PNS stimulates a response.

The CNS processes information. The brain has three parts. cerebrum controls thought, movement, emotion cerebellum allows for balance brain stem controls basic life functions Brain stem midbrain pons medulla oblongata

The brain stem has three parts. midbrain controls some reflexes pons regulates breathing medulla oblongata controls heart function, swallowing, coughing midbrain pons medulla oblongata

The spinal cord controls reflexes. sensory neuron sends impulse to spinal cord spinal cord directs impulse to motor neuron does not involve the brain interneuron motor neurons sensory neuron

The PNS links the CNS to muscles and other organs. The somatic nervous system regulates voluntary movements. The autonomic nervous system controls involuntary, functions sympathetic nervous system: “fight vs. flight” parasympathetic nervous system: calms the body, conserves energy

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