Compared to a person without the APOE4 allele, a person with one APOE4 allele has ______ times the risk of developing Alzheimer-type dementia in old age

Evidence for the existence of a descending pain-control circuit came from the finding that

A) stimulation of the PAG produces analgesia. B) the PAG contains opiate receptors. C) some opiates are endogenous. D) all of the above E) none of the above

The significance of Ebbinghaus's work is in his ____.?

a. ?finding that longer material takes more time to learn b. ?rigorous use of experimental control and his quantitative analysis of data c. ?tolerance for boredom d. ?use of large numbers of subjects to replicate his experiments e. ?ability to further the approach and findings of Wundt