Evolutionary Explanations Flashcards
what is the EEA
Environment for Evolutionary Adaptibility
why is fat a preferred food group
not available to ancestors - highly caloric
- energy dense
- palatability
why is salt a preferred food group
essential for cell functioning
- palatability
why is sugar a prefferred food group
fructose = fast acting energy source
- found in fruit
Torres (2008) - fat
meta-analysis of stress and fat
- stress = fight or flight = need for energy = fat
Harris - salt
16-25 week olds given salt in breast milk = innate
Steiner - sugar
sugar on new born tongues = smiling = (positive facial expressions) - can distinguish fructose
Rozin (1982) - sugar
born with mostly sweet taste receptors - innate ability to distinguish sugars - fructose pref
Zhao (2008) - sugar
2 codes for genes (sugar taste receptors) T1r2 + T1r3
Mennella - height
kids who like sweetness over saltiness = taller
Bell - North Alaska
NA - no contact with sugar = still enjoyed = adaptive pref
