Parabiotic rats:
a. Are genetically similar
b. Share a blood supply
c. Are rats who have a steady diet rich in yogurt and other foods with active cultures
d. Are rats that are on a high dose of antibiotics
Question 2
The role of dopamine as the only factor in drug abuse has been questioned because:
a. Most drugs of abuse do not alter levels of dopamine
b. PCP produces its rewarding effects by stimulating glutamate receptors
c. The rewarding effects of cocaine are blocked by naloxone
d. Opiates play a role in the rewarding effects of alcohol