2. instinct
3. drive-reduction theory
4. homeostasis
5. incentive
6. hierarchy of needs
7. glucose
8. set point
9. basal metabolic rate
10. anorexia nervosa
11. bulimia nervosa
12. binge-eating disorder
13. sexual response cycle
14. refractory period
15. estrogens
16. testosterone
17. sexual orientation
18. emotion
19. James-Lange theory
20. Cannon-Bard theory
21. two-factor theory
22. polygraph
23. facial feedback
24. catharsis
25. feel-good, do-good phenomenon
26. well-being
27. adaptation-level phenomenon