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Nervous system (Types of sensory receptor (Thermoreceptor (Cold detect…

- - - - Axons are covered by a white insulating
        layer called the myelin sheath
- - - - Central nervous system (CNS)
        
        consist of brain and spinal cord
      - Peripheral nervous system (PNS)
        
        consist of all the nerves that branched out
        from the CNS
- - - - When a neuron is not conducting an impulse,
        its resting potential is about −65 mV
    - - rapid change in polarity across
        axonal membrane as nerve impulse occurs
        
        ends
        
        Repolarization to
        −65 mV as K+ gates
        open and K+ moves
        to outside the axon
        
        begin
        
        Depolarization to
        +40 mV as Na+
        gates open and
        Na+ moves to
        inside the axon
- - - - functions
        
        Somatic nervous system that regulate voluntary actions
        such as walking
        
        Autonomic nervous system that regulate involuntary
        actions such as hormone secretion and peristalsis
        
        divided into
        
        Parasympathetic Division
        
        Sympathetic Division