The Nervous System - PowerPoint PPT Presentation

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The Nervous System

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  1. The Nervous System

  2. Video Anticipation Statements • Pain happens only in your head. • Anyone can be hypnotized. • Nerves don’t actually touch each other. • Not feeling pain is a good thing. • Most people can get along just fine with out senses. • You can control your nervous system.

  3. Challenge ? • Are you more right-brained or more left-brained? • Take the Test • Describe/diagram your results below.

  4. Connection • Why is it important that reflexes occur without thought?

  5. Vocabulary • Central nervous system • Peripheral nervous system • Impulse • reflex

  6. Resources • Video – • Human Body: Pushing the Limits: Sensation (open) • Human Body: Pushing the Limits: Brain Power(close) if time allows • Be Nervy – Simulate nerve impulses • Guided Notes • Complete Objective Notes

  7. Describe the peripheral nervous system • Function of system – Collects, sends information to and responds to information from the central nervous systems • Neurons transmit information by – special cells that transfer messages (impulses)around the body by electrical energy • sensory neurons –collect information and send to CNS • motor neurons – respond to information sent from CNS

  8. Describe the central nervous system • Function of system – Processes information sent by the PNS • Brain- largest organ in nervous system –mission control • cerebrum- stores memories, controls voluntary movement, detects touch, light, sound, sight, odors, taste; judgment • cerebellum- controls body position and movement • medulla- controls most involuntary processes; life processes • Spinal Cord – connects PNS with brain – relay; initiates reflexes before signal can travel to brain -

  9. Explain the difference between neurons and nerves • Neurons are cells that transfer electrical impulses through out the body and nerves are the axon parts of the neurons bundled together with blood and connective tissue