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The Nervous System

The Nervous System. Function of The Nervous System. Control and coordinate functions throughout the body Respond to internal and external stimuli. Components of the N ervous System. Central N ervous System – Brain and spinal cord Peripheral Nervous System – All other nerves.

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The Nervous System

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  1. The Nervous System

  2. Function of The Nervous System • Control and coordinate functions throughout the body • Respond to internal and external stimuli

  3. Components of the Nervous System • Central Nervous System – Brain and spinal cord • Peripheral Nervous System – All other nerves

  4. How Neurons Work • Neuron - Message sending unit of the nervous system • Axon - Carries information away from the cell’s nucleus • Dendrite - Carries information to the cell’s nucleus

  5. How Impulses Are Carried • Synapse - Gap between an axon and dendrite • Flow of Impulse: dendrite  nucleus  axon  jumps synapse  next dendrite

  6. Reflexes • They are involuntary • They happen very quickly • Take place without the brain receiving the message • They protect you from serious injury

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