When placebos affect expectations, they also seem to affect the brain mechanisms underlying pain

The basic need associated with the third level of Maslow's hierarchy of needs is

having loving friends, family, and community. respect and esteem. fulfilling one's true potential. food, water, shelter.

Based on results from surveys about people's motivation for sex, it can be concluded that:

a. there is not much of a relationship between the biological and psychological basis for having sex. b. people only have sex for one of two reasons. c. sexual activity ends at old age. d. reasons why people report having sex are highly varied.