Which epidemiological method is essentially the same as a longitudinal study?

Which of the following students provides the most accurate information about memory in elderly adults, as opposed to younger adults?

a. Kanako: "Elderly adults are much more likely to have decreased frontal-lobe activation." b. Stacey: "Elderly adults often have more trouble paying attention." c. Curtis: "Elderly adults have much more trouble using strategies to enhance their performance on long-term memory tasks." d. Juan: "Elderly adults have much more trouble on implicit memory tasks."

Despite its dangers, a young man continues to take cocaine because of the feeling of euphoria it produces for him. This powerful arousal of his nervous system is probably due to cocaine's ability to

A) inhibit enzymes that break down neurotransmitters. B) increase the release of neurotransmitters. C) block the receptor sites for neurotransmitters. D) prevent neurotransmitters from being reabsorbed into presynaptic terminals.