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OLFACTORY - Coggle Diagram

- - - - food, spoiled food
      - help many species.
        
        track prey, / detect predator
        
        mammal ,
        
        more sensitive sense than human.
        
        put their nose where the odor are the strongest,
        
        difference in sensitive between human and mammal.
        
        as the dog follows odor trails, sniffs along the road where the odor of a passing animal may have clung
        
        Dog - campion in world
        
        with their remarkable ability to sniff (practically anything)
        
        True title:
        Polar Bear - Adult healthy polar bear
        
        can smell over kilometer away (seal) under the ice
        
        even , bloodhound's nose
        
        would not be very useful, ( if it were located five/six feet above the ground, as our is)
      - Scientific research
        
        was gratified to learn that a scientific study
        
        established, the fact that, when people sniff as low as the ground, as dog do
        
        their olfactory system works much better.
  - - - reside within 2 patches of mucous membrane
      - The olfactory epithelium
        
        a thin cellular tissue that runs along the roof of the nasal
  - - - stimulus for odor
      - consists
        
        Volatile substances
        
        having a molecular weight in range of approximately 15 - 300
        
        almost all odorants compound
        
        are lipid soluble and organic origin
  - - - most importance ways to interact with the environment
- - - - Odors have the abilities to mask each other
        
        Example - Cooks know how to mask spoiled food with spices
  - - - Dental drill and mineral oil
      - Increased blood flow when different odorants were presented
      - Identified the regions that responded to bad-smelling odorants and some good smelling odorants.
  - - - Qualities of odorants
    - - Chemical structures of odorants
    - - 2 perceptual qualities
        
        Exp: Lemonlike / Vegetblelike
        
        Activated 2 different neurons in the posterior piriform cortex
      - 2 chemical structure
        
        Exp: Alcohol / Aldehydes
        
        Activate 2 different neurons in anterior piriform cortex