A mild degree of pain releases the neurotransmitter ____. A more intense pain also releases ____.
a. glutamate; substance P
b. GABA; substance P
c. glutamate; dopamine
d. GABA; dopamine
Question 2
The brain area most often linked to drug addiction is the ____.
a. nucleus accumbens
b. whole limbic system
c. frontal lobes
d. brain stem