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sms4lyfe sms4lyfe
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6 years ago
Researchers believe that genetic factors influence happiness by means of determining
 
  a. the availability of norepinephrine in the brain.
  b. the likelihood of developing mental illness.
  c. the set point around which happiness tends to settle. d. the speed of transmission of neural messages.
  e. the sensitivity of dopamine receptors.
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6 years ago
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