O] Withdrawal [O] Rebound Reason: Page 116 INCORRECT 2: Select the incorrect statement concerning receptors in the nervous system. [O] Many psychoactive drugs exert their pharmacological effects by either activating or inactivating receptors on neurons. [X] Activation of most receptors alters the functioning of the cell. [O] They are protein sites on cells that respond to endogenous chemical messengers, such as neurotransmitters. [>] Drugs that are agonists keep the receptor from being activated. Reason: Page 121-122 INCORRECT 3: Select the incorrect statement. [X] Parkinson's disease is due to damage of dopamine neurons in the basal ganglia. [>] For the most part, drugs of abuse decrease the activity of dopamine in the limbic system. [O] Drugs that alter the activity of dopamine-releasing neurons often affect motor activity. [O] The Reticular Activating System helps to regulate the brain's state of arousal. Reason: Page 125 INCORRECT 4: Select the incorrect statement concerning the hypothalamus. [>] Because it is isolated, drugs of abuse are less likely to affect the hypothalamus than other brain areas. [O] It is important in the CNS regulation of endocrine systems. [O] It serves as the CNS control center for the autonomic nervous system. [X] It is important in maintaining homeostasis in the body. Reason: Page 128 INCORRECT 5: Which of the following effects is least likely to be caused by a sympathomimetic drug? [O] enlarged pupils of the eye [O] reduced muscle contraction in the stomach [>] slowed heart rate [X] increased blood pressure Reason: Page 129 INCORRECT 6: Which of the following is least likely to be caused by abusing anabolic steroids? [>] sedation and a mellowing of temper [O] stimulation of muscle mass [X] headaches [O] disrupted sleep patterns Reason: Page 131-132 INCORRECT 7: Hormones are chemical messengers used by neurons to communicate with each other. [X] TRUE [>] FALSE Reason: Page 116 CORRECT 8: Natural chemicals, produced by the body, can cause the same effects as narcotic drugs. [X] TRUE [O] FALSE Reason: Page 121 CORRECT 9: Both motor activity and mental state are usually altered by drugs that affect the neurotransmitter dopamine. [X] TRUE [O] FALSE Reason: Page 125 CORRECT 10: The limbic system in the brain helps to regulate memory and emotional activities. [X] TRUE [O] FALSE Reason: Pages 127