Look up: endorphins

1. 
   Endorphins
   Neurotransmitters produced in the brain that generate cellular and behavioral effects like those of morphine.
   Found on http://www.bbc.co.uk/radio4/reith2003/gl
   
   
2. 
   Endorphins
   a neuropeptide which has specific binding sites on nerve cells called opiate receptors. When the receptor is activated by endorphins or morphine it reduces the excitability of the post synaptic cell. Peptide receptors are also found on lymphocytes which suggest an association between neuropeptides and the regulation of the immune response.
   Found on http://www.eclipse.co.uk/moordent/glossa
   
   
3. 
   endorphins
   These morphine like substances are produced on exercise and have a direct action on the brain giving a sense of euphoria.
   Found on http://rsi.websitehosting-services.co.uk
   
   
4. 
   Endorphins
   A range of naturally produced opium-like substances found in the brain which act as neurotransmitters and affect natural pain control.
   Found on http://www.nas.org.uk/nas/jsp/polopoly.j
   
   
5. 
   Endorphins
   any of a group of proteins with potent analgesic properties that occur naturally in the brain. These are the brain chemicals that contribute to the 'runner's high' or good feelings during and after exercise.
   Found on http://www.rei.com/learn/Crosstrain/rei/
   
   
6. 
   endorphins
   A family of peptide hormones that bind to receptors that mediate the actions of opiates. Released in response to neurotransmitters and rapidly inactived by peptidases. Physiological responses to endorphins include analgesia and sedation.
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7. 
   endorphins
   One of the three major groups of endogenous opioid peptides. They are large peptides derived from the pro-opiomelanocortin precursor. The known members of this group are alpha-, beta-, and gamma-endorphin. The term endorphin is also sometimes used to refer to all opioid peptides, but the narrower sense is used here; opioid peptides is used for the ...
   Found on http://www.mondofacto.com/facts/dictiona
   
   
8. 
   endorphins
   Opioid peptides originally isolated from the brain but now found in many parts of the body; in the nervous system, endorphins bind to the same receptors that bind exogenous opiates. A variety of endorphins (e.g., , , and ) that vary not only in their physical and chemical properties but also in physiologic action have been isolated. See Also: enkep...
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9. 
   Endorphins
   Chemicals that the brain generates in order to regulate pain. These natural pain-killers are released at times of severe mental stress or strenuous exercise. Hightened endorphin levels can provide a natural sense of pain relief, calmness and euphoria for women during labor and delivery.
   Found on http://www.pregnology.com/AZ/E/3
   
   
10. 
    endorphins
    endorphins (endôr'finz) , neurotransmitters found in the brain that have pain-relieving properties similar to morphine. There are three major types of endorphins: beta endorpins, found primarily in the pituitary gland; and enkephalins and dynorphin, both distributed throughout the nervous ...
    Found on http://www.infoplease.com/ce6/sci/A08173