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The Nervous System

Neurons and Nerves
Central Nervous System
Peripheral Nervous System
Chemical Connection: Endocrine Gland






Neuroscience

Neuroscience is a branch of the life sciences that deals with the structure and function of neurons, nerves and nervous tissue, especially focusing on their relationship to behavior and learning.


Neuron




Neurotransmitters


  •   Agonists - chemical substances that mimic or enhance the effects of a neurotransmitter on the receptor sites of the next cell, increasing or decreasing the activity of that cell.   
Antagonists - chemical substances that block or reduce a cell’s response to the action of other chemicals or neurotransmitter.
 
 
 
 
 








 






 Peripheral Nervous System
  •   Somatic nervous system = sensory pathway + motor pathway 
  • Autonomic nervous system = parasympathetic + sympathetic  
    Parasympathetic – ordinary conditions
    Sympathetic – fight-or-flight system




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