What caused our population to double from 1 billion to 2 billion in the 20th century?
What will be an ideal response?
medical advancements that helped eliminate diseases like smallpox, typhus, diphtheria, and cholera.
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Psychologist Jeffrey Arnett describes the transition from adolescence to adulthood with the term
a. selective optimization. b. intimacy versus isolation. c. emerging adulthood. d. midlife crisis. e. moratorium.
According to Barry, Rich, and Carlson (1993), functional adaptations to exercise in frail elderly patients include
A. increase in anxiety and appetite B. decrease in socialization C. increase in maintenance of lean body mass, weight control, and metabolic rate D. decrease in plasma volume and insulin receptor sensitivity
Biological factors in hunger include
a. stomach contractions. c. the hypothalamus. b. blood sugar level. d. all of these.
Which of these is not a key assumption in Zajonc's model of social facilitation?
(a) people have a response hierarchy, in that in a given situation there is a most probable response, a second most probable one, etc. (b) arousal increases the probability that the dominant response will be made (c) the presence of others increases arousal (d) behavior in the presence of high arousal is more efficient than in the presence of low arousal