A human cell normally contains ______ chromosomes

By pairing the ringing of a bell with the presentation of meat, Pavlov trained dogs to salivate to the sound of a bell even when no meat was presented. In this experiment, salivation to the meat was the _______

a. unconditioned stimulus b. unconditioned response c. conditioned stimulus d. conditioned response

Which of the following statements is true about the average brain of individuals with schizophrenia when they are compared to the brains of persons who do not have the disorder?

a. There are no known anatomical differences. b. The overall size of the brain is actually larger than normal in people with schizophrenia. c. Dopamine activity is lower than normal in people with schizophrenia. d. The fluid-filled spaces at the core of the brain are larger in people with schizophrenia.