Induced depression of single neurons in brain areas with opiate receptors
- Enkephalin, applied microiontophoretically, depressed spontaneous and glutamate-induced firing of  one neuron in frontal cortex, caudate nucleus, and periaqueductal gray matter, where enkephalin and high concentrations of opiate receptors are met.
- More than one depressions were blocked by the specific narcotic antagonist naloxone. The results  are durable with a neurotransmitter or neuromodulator role for this new brain pentapeptide.
- Opium derivatives have been in medical use for the last  2000 years, and may be   longer than any other class of drugs
- . The brain regions which was  involved in these actions have been identified in some instances by local microinjection of pmole quantities of opioids.
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Answer:
This energy comes from the food we eat. Our bodies digest the food we eat by mixing it with fluids (acids and enzymes) in the stomach. When the stomach digests food, the carbohydrate (sugars and starches) in the food breaks down into another type of sugar, called glucose.
Explanation:
 
        
             
        
        
        
Storing nutrition and keeping warm, A good example would be walruses since they have no fur to keep warm
        
                    
             
        
        
        
Answer:
Theory
Explanation:
It is a substantiated explanation because of the set of facts and observations on the experiment.