Question 1
Which lymphocyte helps the immune system by directly attacking diseased cells with lethal chemicals?
◦ T cells
◦ Natural killer cells
◦ B cells
◦ Y cells
Question 2
Which neurotransmitter is involved in both the brain's response to appealing foods and illegal drugs?
◦ GABA
◦ Serotonin
◦ Dopamine
◦ Acetylcholine