One neurotransmitter that tends to create excitatory messages that lead to muscle contraction is:

Individuals in identity crisis are engaged in __________________________

a) self-exploration, while at the same time realizing they have some choices to make b) learning a new facet of commitment; the mutual give-and-take that sustains long-term love relationships c) caring about the next generation and anxious to find creative ways to share their own resources d) acknowledging the regrets

Samantha was diagnosed with Lyme disease and as a result has problems with balance and coordination. When she walks, it looks as if she is intoxicated, even though she does not drink alcohol

Which of the following structures is related to Samantha's balance and coordination? a. the hippocampus b. the cerebellum c. the brain stem d. the corpus callosum