What role do neurotrophins appear to play in development of the nervous system?
A. They promote neuron pruning.
B. They assist neurons in migrating to their final destinations in the brain.
C. They extend the connecting range of existing neurons.
D. They promote the survival of neurons that have connections with nearby neurons.
Ans: D. They promote the survival of neurons that have connections with nearby neurons.
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Which factor has been LEAST correlated with high levels of cognitive functioning in later life?
a. Being an only child b. High cognitive functioning of a spouse c. Flexible personality style at midlife d. Absence of cardiovascular disease
What best describes the role of testosterone in sexual behavior?
a. Important for male sexual behavior b. Important for female sexual behavior c. Important for both male and female sexual behavior d. Not related to sexual behavior
Studies of nonhuman language abilities call attention to the ____
a. ability of many species to learn language b. close relationship between language and classical conditioning c. difficulty of defining language d. close relationship between language and brain size
Carl, who is in his early 80's, has a history of strokes and overtime has developed significant disturbances in memory, reasoning, judgment, impulse control, and personality. This combination has left him confused, suspicious, apathetic, and withdrawn. Carl is most likely suffering from
a. Alzheimer's disease. b. dementia. c. normal old age mental losses. d. a paranoid delusional disorder.