Excessive daytime sleepiness and sudden, uncontrollable attacks of REM sleep are symptoms of __________

The speed at which a neural impulse travels is increased when the axon is encased by

A) endorphin. B) myelin sheath C) glial cells D) synaptic vesicle

Andrew is a normal-looking 5-year-old boy who is having

some behavioral difficulties. Although he tries to be a good kid, he is sometimes so impulsive that he gets into trouble. Kara, his mother, cannot understand why he is impulsive. She reads all of the parenting books she can get her hands on and has set, and enforced, fair guidelines for his behavior. Andrew's behavior is puzzling to her. Kara's mother, who happens to be a researcher in the field of prenatal development, is not very puzzled by the situation at all. She speculates that Andrew's behavior is a result of Kara drinking small amounts of alcohol throughout her pregnancy, even when she advised Kara not to. Kara's mother is likely concerned about _____ a) severe mental retardation. b) fetal alcohol effects. c) an insecure attachment. d) fetal alcohol syndrome.