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The Nervous System

The Nervous System. The Nervous System. Central Nervous System. Peripheral Nervous System. nerves and ganglia outside of the brain and spinal cord. Brain and Spinal Cord. Motor Neuron. Relay and Sensory Neurons. Reflex Arc. Signal goes Sensory -> Relay -> Motor Action bypasses brain.

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The Nervous System

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  1. The Nervous System

  2. The Nervous System Central Nervous System Peripheral Nervous System nerves and ganglia outside of the brain and spinal cord • Brain and Spinal Cord

  3. Motor Neuron

  4. Relay and Sensory Neurons

  5. Reflex Arc • Signal goes • Sensory -> Relay -> Motor • Action bypasses brain

  6. Reflex Arc Receptor Effectors The muscle that moves to avoid the pain. • The nerve that “feels” the pain Muscles can only pull, never push!

  7. Antagonistic Muscles- Muscles that work against each other.

  8. Sensory Organs • Groups of receptor cells responding to stimuli. Such as: Light, sound, touch, temperature and chemicals

  9. Light Accommodations of the Eye

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