LIFESCI 15 Lecture Notes - Lecture 8: Basal Metabolic Rate, Large Intestine, Calorie Restriction
Document Summary
Diets vary widely among animals: herbivores > eat only plants, carnivores > eat only animals, omnivores > eat plants & animals. But -> the processing and deriving of energy from food is always the same. The kilocalorie > 1000 calories (energy req"d to raise 1g h2o by 1 celcius = 1 calorie) How many are needed: human female -> 1800-2400 kcal/d, human male -> 2400-3200 kcal/d. Basal metabolic rate (bmr: energy needed to maintain life without activity females > 1400 kcal/d, males > 1700 kcal/d. ^ equal to 1 75 watt light bulb for 24hr. In shrews: 35x as high: heart rate ~500 beat/min. Take home message #1: bmr is the energy expenditure necessary to keep a resting animal alive. Note >> harsh conditions help break down foods. Humans aid the process by: cook food in high temps, marinate in harsh acids (lime juice/vinegar)
