| A | B |
| genes | building blocks of heredity |
| sickle cell anemia | genetic mutation unique to African-Americans |
| Down Syndrome | extra chromosome on the 21st pair |
| identical twins | share exact same chromosomes |
| John Watson | proponent of nurture |
| Sir Galton | proponent of nature |
| hunger drive | biological need for food gives rise to |
| William James | instinct theory |
| most people's eating habits disprove this theory | drive reduction |
| cues body to stop eating | ventromedial hypothalamus |
| cues body to start eating | lateral hypothalamus |
| this results when fat cells shrink | feeling of hunger |
| muscle content | correlates with metabolism |
| reason for fulfilling biological need | survival |
| smile | universal sign of approval & friendliness |
| young adult | age schizophrenia first appears |
| hypnosis | has been shown effective in helping people to stop overeating |
| child abuse | an example of a learned behavior |
| Harry Harlow | baby monkey study |
| drive | motivates an organism to take action |