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LU10: NERVOUS SYSTEM (Neurons (constitute 3 major parts (axon (covered by…

- - - - covered by myelin sheath
- - - - Central nervous system (CNS).
        
        brain
        
        spinal cord
      - Peripheral nervous system (PNS).
        
        all the nerves that branched out from the CNS.
- - - - cold
      - hot
    - - Transduces chemical signal into receptor potential
    - - Detect pain from external or internal source
    - - Detect various forms of electromagnetic energy
    - - pressure, touch, stretch, motion & sound