Sandy looks at the final exam and becomes upset when she discovers that it covers two chapters she did not read. As a result, neurons in Sandy's ____ system are releasing the neurotransmitter ____ at the target organs.?

Salvatore has been described by his classmates as unfriendly, argumentative, and unpleasant to be around. If these characteristics had to be summed up in one of the factors of the Big Five, which would it be?

a) conscientiousness b) extraversion c) agreeableness d) openness to experience

What is the name of the protective insulation that surrounds parts of neurons and speeds the transmission of electrical impulses along brain cells but also adds to brain weight?

a) reticular formation b) corpus callosum c) myelin d) cerebellum